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 A205689 #6 Jul 12 2012 00:40:00 %S A205689 1,2,3,2,4,2,2,4,7,6,4,6,2,8,6,4,9,8,6,2,10,8,6,2,8,6,10,6,4,13,12,10, %T A205689 6,4,12,8,6,2,14,12,10,6,4,12,10,4,16,14,12,8,6,2,14,12,6,2,19,18,16, %U A205689 12,10,6,18,14,12,8,6,20,18,16,12,10,6,4,21,20,18,14,12,8 %N A205689 Prime(A205685(n)), the n-th number s(j) such that 5 divides s(k)-s(j), where the pairs (k,j) are given by A205684 and A205685. %C A205689 For a guide to related sequences, see A205558. %e A205689 (See the example at A205684.) %t A205689 (See the program at A205684.) %Y A205689 Cf. A205684, A205558. %K A205689 nonn %O A205689 1,2 %A A205689 _Clark Kimberling_, Jan 30 2012