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 A205557 #6 Mar 30 2012 18:58:11 %S A205557 3,9,6,6,15,12,6,12,6,21,18,12,6,27,24,18,12,6,24,18,12,30,24,18,6,39, %T A205557 36,30,24,18,12,36,30,24,12,6,45,42,36,30,24,18,6,51,48,42,36,30,24, %U A205557 12,6,57,54,48,42,36,30,18,12,6,54,48,42,30,24,18,60,54,48,36 %N A205557 prime(k)-prime(j), where the pairs (k,j) are given by A205560 and A205547. %C A205557 For a guide to related sequences, see A205558. %e A205557 (See the example at A205560.) %t A205557 (See the program at A205560.) %Y A205557 Cf. A205558, A205560, A205675. %K A205557 nonn %O A205557 1,1 %A A205557 _Clark Kimberling_, Jan 30 2012