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 A058237 #10 Apr 17 2020 07:49:10 %S A058237 1,2,3,5,8,9,13,16,24,29,56,120,160,216,493,1093 %N A058237 Numbers n such that x^n + x^4 + 2 is irreducible over GF(3). %o A058237 (PARI) is(k) = polisirreducible(Mod(1, 3)*(x^k + x^4 + 2)); \\ _Jinyuan Wang_, Apr 15 2020 %Y A058237 Cf. A057463. %K A058237 nonn,more %O A058237 1,2 %A A058237 _Robert G. Wilson v_, Dec 01 2000 %E A058237 a(16) from _Jinyuan Wang_, Apr 15 2020