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 A106574 #9 Mar 12 2015 22:14:06 %S A106574 11,17,23,25,31,41,51,53,59,65,67,73,79,83,85,87,91,95,97,101,109,113, %T A106574 115,125,129,133,137,141,143,149,151,153,157,159,163,165,167,175,179, %U A106574 181,185,187,189,193,195,197,199,201,203,207,209,213,215,221,227,229 %N A106574 Indices n of perfect squares n^2 which are neither the sum nor the difference of two primes. %F A106574 a(n) = sqrt(A106573(n)). %e A106574 a(2)=17 because the second square which is nor the sum nor the difference of two primes (289=17^2) is the 17th one in the succession of the perfect squares (thus: index 17). %Y A106574 Cf. A106544-A106548, A106562-A106564, A106571, A106573-A106575, A106577. %K A106574 easy,nonn %O A106574 1,1 %A A106574 _Alexandre Wajnberg_, May 09 2005 %E A106574 Corrected and extended by _Ray Chandler_, May 12 2005