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 A205680 #6 Jul 12 2012 00:40:00 %S A205680 3,3,7,5,5,13,3,7,11,3,7,11,19,5,13,17,3,7,11,19,23,5,13,17,29,5,13, %T A205680 17,29,37,3,7,11,19,23,31,3,7,11,19,23,31,43,5,13,17,29,37,41,3,7,11, %U A205680 19,23,31,43,47,5,13,17,29,37,41,53,3,7,11,19,23,31,43,47,59,3,7 %N A205680 Prime(A205678(n)), the n-th number s(j) such that 4 divides s(k)-s(j), where the pairs (k,j) are given by A205677 and A205678. %C A205680 For a guide to related sequences, see A205558. %e A205680 (See the example at A205677.) %t A205680 (See the program at A205677.) %Y A205680 Cf. A205677, A205558, A205682. %K A205680 nonn %O A205680 1,1 %A A205680 _Clark Kimberling_, Jan 30 2012