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 A195745 #13 Jan 27 2023 08:11:13 %S A195745 31,61,241,7681,15361,61441,2013265921,2061584302081,4123168604161, %T A195745 263882790666241,4222124650659841,4533471823554859405148161, %U A195745 77884452878022414427957444938301441,5612166287350667205902149757630526795478780965027841 %N A195745 Primes of the form 15*2^k + 1. %Y A195745 Primes in A195744. %K A195745 nonn %O A195745 1,1 %A A195745 _Brad Clardy_, Sep 23 2011 %E A195745 Offset corrected and name changed by _Arkadiusz Wesolowski_, Sep 23 2011