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 A205713 #8 Mar 30 2012 18:58:11 %S A205713 1,3,1,5,6,8,3,9,4,1,5,10,7,3,9,13,4,14,6,11,7,16,8,12,4,14,18,1,5,10, %T A205713 15,7,16,20,4,14,18,22,1,5,10,15,23,6,11,19,7,16,20,24,8,12,21,3,9,13, %U A205713 17,8,12,21,29,3,9,13,17,30,1,5,10,15 %N A205713 The number j such that 9 divides prime(k)-prime(j), where k(n)=A205712(n). %C A205713 For a guide to related sequences, see A205558. %e A205713 (See the example at A205712.) %t A205713 (See the program at A205712.) %Y A205713 Cf. A204890, A205712, A205558. %K A205713 nonn %O A205713 1,2 %A A205713 _Clark Kimberling_, Jan 31 2012