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 A086968 #4 Mar 30 2012 17:26:09 %S A086968 4,7,23,26,35,39,41,42,57,64,77,98,102,103,108,111,140,156,161,163, %T A086968 167,184,185,186,216,228,267,269,302,317,318,324,327,331,333,334 %N A086968 Numbers n such that n^2 is a sum k-th prime + k for some k. %Y A086968 Cf. A064371. %K A086968 easy,nonn %O A086968 1,1 %A A086968 _Zak Seidov_, Sep 22 2003