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 A020261 #13 Jul 30 2024 07:58:17 %S A020261 9,1261,2701,2871,5083,11041,13051,15051,16441,16589,22681,23959, %T A020261 31201,31621,38081,39091,44749,49601,49771,50737,54223,74023,79381, %U A020261 100081,113527,117157,151061,151313,154201,160147,169801,203841,282133,304057 %N A020261 Strong pseudoprimes to base 35. %H A020261 R. J. Mathar, <a href="/A020261/b020261.txt">Table of n, a(n) for n = 1..300</a> %H A020261 <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a> %p A020261 for n from 2 do %p A020261 if isStrongPsp(n,35) then # calls code in A001262 and A007814 %p A020261 print(n) ; %p A020261 end if; %p A020261 end do: # _R. J. Mathar_, Jul 30 2024 %K A020261 nonn %O A020261 1,1 %A A020261 _David W. Wilson_