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 A297412 #15 Jul 22 2021 02:14:13 %S A297412 43,114,163,258,326,379,487,758,762,883,974,978,1459,1766,2274,2647, %T A297412 2918,2922,3079,3943,5294,5298,5419,6158,7886,8754,9199,10838,11827, %U A297412 14407,15882,16759,18398,18474,18523,23654,23658,24967,26407,28814,32514,33518,37046,37339,39367 %N A297412 Numbers k such that A019320(k) is in A217468. %o A297412 (PARI) is_A297412(n) = my(m=polcyclo(n, 2)); Mod(2, m*(m-1))^m==2 && !ispseudoprime(m); %Y A297412 Set difference of A297413 and A072226. %K A297412 nonn %O A297412 1,1 %A A297412 _Max Alekseyev_, Dec 29 2017