Thanks, but I don't think I'm accepting this. There are aspects of this site I don't go along with.

@RodrigodeAzevedo It is not $\mathrm{\LaTeX}$, but MathJax; in any case, use $\mathrm{\LaTeX}$ in MathJax, so the output is right.

My classic is “5, 10, 20, 30, 36”, which has a unique entry in OEIS.

I surely don't want to generalize. But you were the second to vote for closing the question for “missing context”. You could have added that you apologize for having being hasty in so judging that question.

@MartinSleziak Possibly. However, I noticed some hasty closures for “missing context”, when the context was given. This is a prominent example, where who voted for closure didn't take their time to read the whole question. Another very similar is math.stackexchange.com/questions/3057518 which has two close votes ATM.

I think that the OP would have a hard time writing down everything in their attempt, particularly the diagram. Being a “new contributor”, their question should have been considered with more attention than just pushing the close button.