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 A215566 #17 Mar 31 2024 02:14:56 %S A215566 112141,432821,1024651,1563151,1627921,3543121,4291801,5481451, %T A215566 8595361,9780409,10679131,11407441,18790021,21397381,22369621, %U A215566 25326001,27012001,32817151,33796531,35798491,42149971,48064021,67680491,99809051,116151661,118846151,129762001 %N A215566 Strong pseudoprimes to bases 3 and 5. %C A215566 Terms A215566[1,...,35] calculated from A020231[1,...,715] and double-checked (up to a(32)=178482151) using A020229[1,...,752]. %H A215566 Amiram Eldar, <a href="/A215566/b215566.txt">Table of n, a(n) for n = 1..1209</a> (terms below 10^12; terms 1..35 from M. F. Hasler) %Y A215566 Intersection of A020229 and A020231. %Y A215566 Cf. A072276, A215568. %K A215566 nonn %O A215566 1,1 %A A215566 _M. F. Hasler_, Aug 16 2012