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 A205679 #7 Jul 12 2012 00:40:00 %S A205679 7,11,11,13,17,17,19,19,19,23,23,23,23,29,29,29,31,31,31,31,31,37,37, %T A205679 37,37,41,41,41,41,41,43,43,43,43,43,43,47,47,47,47,47,47,47,53,53,53, %U A205679 53,53,53,59,59,59,59,59,59,59,59,61,61,61,61,61,61,61,67,67 %N A205679 Prime(A205677(n)), the n-th number s(k) such that 4 divides s(k)-s(j) for some j<k, where s(j)=prime(j). %C A205679 For a guide to related sequences, see A205558. %e A205679 (See the example at A205677.) %t A205679 (See the program at A205677.) %Y A205679 Cf. A205677, A205558. %K A205679 nonn %O A205679 1,1 %A A205679 _Clark Kimberling_, Jan 30 2012