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 A020232 #20 Feb 16 2025 08:32:33 %S A020232 217,481,1111,1261,2701,3589,5713,6533,11041,14701,20017,29341,34441, %T A020232 39493,43621,46657,46873,49141,49661,58969,74023,74563,76921,83333, %U A020232 87061,92053,94657,94697,97751,97921,109061,115921,125563,128627,151387,173377 %N A020232 Strong pseudoprimes to base 6. %H A020232 Amiram Eldar, <a href="/A020232/b020232.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..210 from R. J. Mathar) %H A020232 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/StrongPseudoprime.html">Strong Pseudoprime</a> %H A020232 <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a> %Y A020232 Cf. A005937, A001262, A020229, A020230, A020231. %K A020232 nonn %O A020232 1,1 %A A020232 _David W. Wilson_