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 A058243 #12 Apr 17 2020 08:21:34 %S A058243 2,3,4,5,6,11,15,16,19,23,32,48,112,127,147,187,203,240,320,335,432, %T A058243 471,515,775,887,1055,1131,1423 %N A058243 Numbers n such that x^n + x^8 + 1 is irreducible over GF(3). %o A058243 (PARI) is(k) = polisirreducible(Mod(1, 3)*(x^k + x^8 + 2)); \\ _Jinyuan Wang_, Apr 15 2020 %Y A058243 Cf. A057478. %K A058243 nonn,more %O A058243 1,1 %A A058243 _Robert G. Wilson v_, Dec 01 2000 %E A058243 a(26)-a(28) from _Jinyuan Wang_, Apr 15 2020