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 A058334 #21 Apr 17 2020 07:41:12 %S A058334 0,1,2,3,7,18,22,27,31,78,94,115,171,402,438,507,1363,1467,2263,2283, %T A058334 3627,9247,9955 %N A058334 Numbers n such that the trinomial x^n + x + 1 is irreducible over GF(5). %C A058334 No other n < 4400. - _Michael Somos_, Mar 12 2007 %C A058334 Next term > 10^4. [_Joerg Arndt_, Mar 02 2016] %o A058334 (PARI) isok(n) = polisirreducible(Mod(1, 5)*(x^n + x + 1)); \\ _Michel Marcus_, Feb 11 2014 %o A058334 (Sage) %o A058334 P.<x> = GF(5)[] %o A058334 for n in range(0, 10000): %o A058334 if (x^n+x+1).is_irreducible(): %o A058334 print(n) %o A058334 # _Joerg Arndt_, Mar 02 2016 %Y A058334 Cf. A002475 (GF(2)), A058857 (GF(7)). %K A058334 nonn,more %O A058334 1,3 %A A058334 _Robert G. Wilson v_, Dec 13 2000 %E A058334 a(1) and a(2) from _Eric M. Schmidt_, Feb 10 2014 %E A058334 a(22) and a(23) from _Joerg Arndt_, Mar 02 2016