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 A256172 #27 Jul 07 2015 08:02:18 %S A256172 31,223,439,1399,2383,2767,3343,3463,3607,4567,6079,7927,8167,8287, %T A256172 8719,10159,10663,11959,14503,15559,15727,17383,18223,19087,20743, %U A256172 21487,21559,24007,25639,26647,27103,27583,28807,28879,29167,29599,31183,32359,33343 %N A256172 Primes of the form 6*p + 1 with p prime that are also of the form x^2 + 27*y^2 and congruent to 7 mod 24. %C A256172 a(n) divides 2^m - 1, where m = (a(n) - 7)/6 + 1. %F A256172 A014752 INTERSECT A051644 INTERSECT A107006. %Y A256172 Subsequence of A122094. %Y A256172 Cf. A014752, A051644, A107006. %K A256172 nonn %O A256172 1,1 %A A256172 _Arkadiusz Wesolowski_, Jun 01 2015