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 A370190 #4 Feb 25 2024 00:11:06 %S A370190 1,5,7,1003,40513 %N A370190 Numbers k such that (6^k + 6*k)/6 is prime. %C A370190 If it exists, a(6) > 62000. %o A370190 (PARI) is(n) = ispseudoprime(6^(n-1)+n) %Y A370190 Cf. A058828, A221908, A226200. %K A370190 nonn,hard,more %O A370190 1,2 %A A370190 _Hugo Pfoertner_, Feb 24 2024