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 A140658 #14 Nov 29 2021 12:24:18 %S A140658 5173601,13694761,16070429,27509653,54029741,66096253,102690677, %T A140658 117987841,193949641,206304961,314184487,390612221,393611653, %U A140658 717653129,960946321,1157839381,1236313501,1481626513,1860373241,1921309633,2217879901,2412172153,2626783921 %N A140658 Overpseudoprimes to bases 2 and 3. %C A140658 From the first 19 strong pseudoprimes to bases 2 and 3 (A072276) only 6 are overpseudoprimes to the same bases. %H A140658 Daniel Suteu, <a href="/A140658/b140658.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..105 from Amiram Eldar) %H A140658 <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a> %Y A140658 Intersection of A141232 and A141350; subsequence of A072276. %Y A140658 Cf. A001262, A020229. %K A140658 nonn %O A140658 1,1 %A A140658 _Vladimir Shevelev_, Jul 10 2008 %E A140658 More terms from _Amiram Eldar_, Jun 24 2019