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 A262043 #25 Jun 25 2019 11:32:12 %S A262043 561,1105,2821,6601,8911,10585,29341,52633,62745,63973,101101,115921, %T A262043 126217,188461,252601,278545,294409,314821,334153,340561,410041, %U A262043 512461,552721,658801,748657,825265,852841,1024651,1033669,1082809,1152271,1193221,1461241,1569457,1909001 %N A262043 Carmichael numbers (A002997) that are not absolute Euler pseudoprimes (A033181). %C A262043 These are composite numbers n such that b^(n-1) == 1 (mod n) and abs(b^((n-1)/2) mod n) <> 1 for every b coprime to n. %H A262043 Amiram Eldar, <a href="/A262043/b262043.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..131 from Daniel Lignon) %Y A262043 Cf. A002997 (Carmichael numbers), A033181 (absolute Euler pseudoprimes). %K A262043 nonn %O A262043 1,1 %A A262043 _Daniel Lignon_, Sep 09 2015