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 A370557 #5 Feb 25 2024 10:30:17 %S A370557 1,2,1014,16058 %N A370557 Numbers k such that A362555(k) = (5^k + 5*k)/5 is prime. %C A370557 If it exists, a(5) > 50000. %o A370557 (PARI) is(n) = ispseudoprime(5^(n-1)+n) %Y A370557 Cf. A104745, A362555, A370190. %K A370557 nonn,hard,more %O A370557 1,2 %A A370557 _Hugo Pfoertner_, Feb 24 2024