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 A226914 #6 Jun 22 2013 10:59:59 %S A226914 1,0,0,2,0,0,2,0,2,0,2,0,2,0,2,0,0,0,0,2,2,2,0,2,2,0,2,0,0,2,2,0,2,0, %T A226914 0,2,0,0,2,0,0,0,2,2,0,2,0,2,0,0,2,2,2,0,2,2,0,2,0,2,0,0,0,2,2,0,0,2, %U A226914 0,0,2,2,2,0,0,2,0,0,2,2,0,0,2,2,2,0,2,2,0,2,0,2,2,0,0,2,0,2,0,0 %N A226914 Third column of A226518. %F A226914 a(n) = 1 + Legendre(2,prime(n)). %Y A226914 Cf. A226518, A226523, A226915. %K A226914 nonn %O A226914 1,4 %A A226914 _N. J. A. Sloane_, Jun 22 2013