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 A058219 #10 Apr 17 2020 07:50:00 %S A058219 4,6,12,14,28,40,54,78,86,246,390,702,854,1096 %N A058219 Numbers n such that x^n + x^13 + 2 is irreducible over GF(3). %o A058219 (PARI) is(k) = polisirreducible(Mod(1, 3)*(x^k + x^13 + 2)); \\ _Jinyuan Wang_, Apr 15 2020 %Y A058219 Cf. A057483. %K A058219 nonn,more %O A058219 1,1 %A A058219 _Robert G. Wilson v_, Nov 30 2000 %E A058219 a(14) from _Jinyuan Wang_, Apr 15 2020