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 A169864 #2 Mar 30 2012 16:51:45 %S A169864 1,3,4,6,8,10,12,13,15,17,19,21,23,25,26,28,30,32,34,36,38,40,42,43, %T A169864 45,47,49,51,53,55,57,59,61,63,64,66,68,70,72,74,76,78,80,82,84,86,88, %U A169864 90,91,93 %N A169864 The sequence S of a pair S, T generalizing Golomb's sequence A001462 and the pair A093848, A169863. See Comments for definition. %C A169864 S is built with the rules [1] that you cannot insert any integer between two "touching" runs (run 1,3 is followed by 4,6,8,10,12; there is no integer between 3 and 4) and [2] that S and T share no integer. %C A169864 T encodes the instructions for S. %C A169864 It is not quite clear to me if T is the complement of S, or is merely disjoint from it. %Y A169864 Cf. A169865, A001462, A093848, A169863, A169866, A169867. %K A169864 nonn,more %O A169864 1,2 %A A169864 _N. J. A. Sloane_, Jun 27 2010, following a posting from Eric Angelini to the Sequence Fans Mailing List, Jun 22, 2010