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 A205839 #8 Mar 30 2012 18:58:11 %S A205839 2,4,2,6,12,10,8,20,18,16,8,32,26,54,52,50,42,34,88,86,84,76,68,34, %T A205839 142,136,110,232,230,228,220,212,178,144,376,374,372,364,356,322,288, %U A205839 144,608,602,576,466,986,984,982,974,966,932,898,754,610,1596 %N A205839 s(k)-s(j), where the pairs (k,j) are given by A205837 and A205838. %C A205839 For a guide to related sequences, see A205840. %e A205839 (See the example at A205587.) %t A205839 (See the program at A205587.) %Y A205839 Cf. A204890, A205587, A205840. %K A205839 nonn %O A205839 1,1 %A A205839 _Clark Kimberling_, Feb 01 2012