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 A137313 #11 Aug 30 2014 18:57:21 %S A137313 1,2,3,5,6,7,10,11,13,17,23,26,27,30,33,35,37,38,45,46,47,58,61,62,63, %T A137313 70,73,77,81,83,87,90,91,101,102,103,107,110,115,118,121,122,125,126, %U A137313 131,137,138,142,143,146,147,151,161,165,166,170,173,175,177,178 %N A137313 Numbers n such that a type-6 Gaussian normal basis over GF(2^n) exists. %C A137313 A type-t Gaussian normal basis exists for GF(2^n) if p=n*t+1 is prime and gcd(n, (p-1)/ord(2 mod p))==1. %H A137313 Joerg Arndt, <a href="http://www.jjj.de/fxt/#fxtbook">Matters Computational (The Fxtbook)</a>, section 42.9 "Gaussian normal bases", pp.914-920 %Y A137313 Cf. A136415. %K A137313 nonn %O A137313 1,2 %A A137313 _Joerg Arndt_, Apr 05 2008