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 A106563 #9 Mar 12 2015 22:21:35 %S A106563 1,11,17,23,25,31,39,41,45,51,53,57,59,65,67,73,79,81,83,85,87,91,95, %T A106563 97,99,101,105,109,111,113,115,123,125,129,133,137,141,143,147,149, %U A106563 151,153,157,159,163,165,167,171,175,179,181,185,187,189,193,195,197,199,201 %N A106563 Numbers n such that n^2 is not the sum of two primes. %F A106563 a(n) = SQRT(A106562(n)). %e A106563 a(3)=17 because the third square which is not the sum of two primes (289=17^2) is the 17th one in the succession of the perfect squares (thus: index 17). %Y A106563 Cf. A106544-A106548, A106562-A106564, A106571, A106573-A106575, A106577. %K A106563 nonn %O A106563 1,2 %A A106563 _Alexandre Wajnberg_, May 09 2005 %E A106563 Extended by _Ray Chandler_, May 12 2005