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 A137311 #8 Aug 30 2014 18:57:21 %S A137311 2,12,20,26,36,42,84,92,98,108,114,132,140,164,188,194,212,218,234, %T A137311 236,258,260,276,290,306,314,324,348,362,372,380,386,402,426,428,444, %U A137311 474,476,482,506,524,548,570,572,602,644,674,692,698,714,716,738,740,764 %N A137311 Numbers n such that a type-5 Gaussian normal basis over GF(2^n) exists. %C A137311 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 A137311 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 A137311 Cf. A136415. %K A137311 nonn %O A137311 1,1 %A A137311 _Joerg Arndt_, Apr 05 2008