While I did not handle that flag let me still comment on this (more generally).
First, yes, the post is off-topic here, yes, in principle something like this is on-topic on SO, thus one in principle one might consider migration.
However, please keep the following in mind.
A question that is migrated and then gets put on hold afterwards is something ...
The number of migration targets available for users is restricted, mostly to avoid incorrect migrations, as such migrations are difficult to undo and also impact another community.
Moderators can migrate to any site in the network. If you want to migrate somewhere else flag for moderator attention (flag, other) and suggest it.
The exact targets available ...
While such questions may be on topic on Mathematics Educators, remember that MathEd.SE is a very young public beta site. Generally migrating questions to beta sites is at least slightly discouraged. In the words of Anna Lear:
Migrating to beta sites isn't something we encourage because beta should be all about a site figuring out its own voice rather ...
Overall there are very few migrations.
Over the last 90 days there were only 8 migrations to Cross Validated (the statistics site) and also 8 to Physics (one of them rejected). Moreover there were 2 to our own meta site.
As regards incoming migrations there were about 30 from each of MathOverflow and Physics, and about 10 from each of Cross Validated and ...
Because there's no need to migrate it. It's a question that's perfectly good here and had answers that were interesting and relevant to this community.
If you want a canonical version on MSO for the site-wide FAQ (though I'm not sure there's a point - it's not exactly frequently asked), you can ask it again.
Grace Note is adding this part here, as another ...
Here's a step-by-step:
Wait a sufficient number of days. (At least one week.) This is just in case someone on Math.SE can answer your question.
Flag for moderator attention. Request the moderators to move the question to MathOverflow.
At this point, one of two things may happen (though it may take a few days).
One of the Math.SE mods with some expertise ...
... having asked it here, where it is not getting any attention?
In such a situation (MO-level post not getting any action at MSE), you, the question owner, can request migration to MO by flagging your post for moderator's attention.
The above situation is largely unrelated to the question of whether there should be an established migration path to MO. ...
Let's at least implement this for very popular arXiv-style tags (ag.algebraic-geometry and such) — it's useful both for migration and for (admittedly rare) visitors from MO asking questions here.
On the other hand, creating synonyms for numerous small tags (like recurrences used for less than 50 questions on MO) seems (to me) to be an overkill.
I'll take this time to remind everyone of the golden rule of migrations:
Don't. Migrate. Crap.
That question would not have survived on mathematica.SE, so there's no point trying to migrate it there. (Incidentally, the question has been asked on mathematica.SE, and doesn't appear to be doing so well right now.)
Onto the other issue. Adding a migration path ...
That can certainly be frustrating, and is a risk any time you offer a bounty. I don't know what your background is, but please note that MathOverflow is intended primarily for professional mathematicians and graduate students doing cutting-edge research. A sufficiently interesting question from outside that community will sometimes get a useful answer, but ...
I'd suggest closing as duplicate with a generic Q/A, which
makes clear that any continuation is possible
shows how to find continuations for simple cases (e.g., method of repeated diffferences for polynomial sequences)
informs how look for sequences on OEIS.org
No and yes. Questions with open bounties cannot be closed for any reason, and this includes migration. In order for a question with a bounty to be migrated, the bounty would first have to be removed. Moderators can remove bounties (and refund the reputation in the process), but we only do this on a case-by-case basis. (See the MSO FAQ.)
At this time, I will have to decline this. In the last 90 days, there have been 10 migrations to Mathematica (with a 30% rejection rate), and 2 to Computational Science (with a 50% rejection rate).
As noted by Mad Scientist in the comments, we only open migration paths to new sites when there's a demonstrated need for the migration path due to high ...
User-driven migration will not be enabled until Academia.SE graduates. It's a SE policy to not enable user-driven migration to beta sites.
But moderators can migrate questions anywhere on the SE network. The tricky part is bringing the question to their attention. It is natural to flag for moderator's attention simultaneously with voting to close as off-...
If your question is overlapping the two disciplines, it may be best to split it into two distinct parts, and post these parts separately in the respective exchanges. Saying this, it is my opinion that the example in your meta post on the TeX exchange belonged solely here and not there, since no part of the question is about how to use LaTeX to get what you ...
If you truly think the question does not fit in on math.se and would be a perfect fit for scicomp.se, you can flag about it, but this occurs infrequently enough on math.se that including it in the related sites would not be practical. There are a number of other sites which we also don't include in the related list for the same reason.
Since the user who wrote the accepted answer does not have an account on math.SE, I assume that the acceptance was before migration. If the author creates an account on math.SE and associates their cstheory.SE account, they can decide to accept another answer if they wish.
If the answering account had been on math.SE and was removed after ...
I'm writing this answer to provide both a target of upvotes for people who would like to see this migration option and a space where we can collect questions that would have been appropriate for the Mathematica site. I agree with Asaf's comment under Grace's answer (which received more upvotes than the answer by the way); we need statistics on what actually ...
Stack Overflow will probably be added as a migration path if
we have a non-negligible number of questions migrated there, and
the users here demonstrate that they have good judgment on such migrations, i.e. don't migrate crap or questions that are off-topic there to SO.
For the time being, flagging the question for moderator attention, "other->belongs to ...
The vast majority of these questions is indeed off-topic. Their closing should continue.
However, doing this with appropriate explanation (e.g. pointing to Puzzling.SE) can become tedious. On the other hand, a migration path is not going to happen as long as Puzzling is in beta, given earlier discussion about this (as linked to by Martin Sleziak). Moreover, ...
The bounty was only placed somewhat recently. There might still be hope.
As you speculate I assume there are not that many users familiar with Singular on the site. I doubt that Stack Overflow would be better. They do not have a tag for it, as far as I can tell, and this likely means it will fall through the cracks (especially if it is a migration).
I have keyed in the synonym mappings for most of the arXiv tags.
A few slight mismatches:
ca.analysis-and-odes points now to analysis; ODE questions will need retagging manually after migration from MO.
ra.rings-and-algebras now maps to abstract-algebra.
cv.complex-variables goes to complex-analysis.
qa.quantum-algebra becomes quantum-groups.
It's an option you can vote on when you close a question as off-topic. You only get a few options, though. Moderators can migrate to any other site in the SE network, so usually you should flag a moderator for migrations you can't vote on yourself.