This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A255345 #17 Apr 02 2015 14:19:30 %S A255345 0,1456,6877444662696557082772912, %T A255345 76275529557006774610910008878682146858549281112703393437716260657617146482196178356917329340682828388636625682127565089301355422219073820139711425456833968 %N A255345 Numbers n such that 90n + 31 is a Mersenne prime. %C A255345 Always an even number. Aside from the first term, appears to always have a last digit of 2, 4, 6 or 8. n for M3, M6, M10 and M13 are represented here, while n for M19, M21, M22 are too large for this list. %Y A255345 Cf. A000668. Subsequence of A201819. Shares at least one term (0) with A224856. %K A255345 nonn %O A255345 1,2 %A A255345 _J. W. Helkenberg_, Feb 21 2015