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 A057476 #18 Nov 29 2022 01:19:27 %S A057476 1,3,5,7,17,31,71,97,167,175,209,385,2159,5617,8921,33425,39119,76625, %T A057476 110249,192127,255265 %N A057476 Numbers k such that x^k + x^6 + 1 is irreducible over GF(2). %C A057476 a(16) > 30000 if it exists. - _Robert Israel_, Nov 11 2016 %C A057476 Any subsequent terms are > 300000. - _Lucas A. Brown_, Nov 28 2022 %H A057476 Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/irred_trinom_f2.py">Python program</a>. %H A057476 Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/irred_trinom_f2.sage">Sage program</a>. %p A057476 select(n -> Irreduc(x^n+x^6+1) mod 2, [$1..1000]); # _Robert Israel_, Nov 11 2016 %Y A057476 Cf. A002475. %K A057476 nonn,more %O A057476 1,2 %A A057476 _Robert G. Wilson v_, Sep 27 2000 %E A057476 a(13)-a(15) from _Robert Israel_, Nov 11 2016 %E A057476 a(16)-a(21) from _Lucas A. Brown_, Nov 28 2022