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 A292199 #18 Sep 13 2017 09:41:01 %S A292199 20,25,27,28,33,35,44,45,48,49,52,54,55,56,60,63,66,68,69,70,72,76,77, %T A292199 80,81,84,87,88,90,91,92,95,96,98,99,100,102,104,105,108,110,112,116, %U A292199 117,119,120,123,124,125,126,129,132,135,136,138,140,141,143,144,145,147,148,150 %N A292199 Numbers m such that there is a prime divisor p > m of 2^m - 1 not of the form k*m + 1. %C A292199 Contains no primes q and no doubled primes 2q. %C A292199 Are there infinitely many such numbers? %H A292199 Max Alekseyev, <a href="/A292199/b292199.txt">Table of n, a(n) for n = 1..829</a> %Y A292199 Cf. A000040, A000225, A060443, A292188. %Y A292199 Contains A291855. %K A292199 nonn %O A292199 1,1 %A A292199 _Thomas Ordowski_, Sep 11 2017 %E A292199 Terms a(19) onward from _Max Alekseyev_, Sep 13 2017