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 A169867 #3 Mar 30 2012 16:51:45 %S A169867 2,5,7,9,14,16,18,20,25,27,29,31,33,35,40,42,44,46,48,50,52,54,65,67, %T A169867 69,71,73,75,77,79,81,83,88,90,92,94,96,98,100,102,104,106,108,110 %N A169867 The sequence T of a pair of complementary sequences (S, T) which are similar to the pairs (A093848, A169863), (A169864, A169865), except that here the lengths of the equal-parity runs of one sequence are given by the other. %Y A169867 Cf. A169866, A001462, A093848, A169863, A169864, A169865. %K A169867 nonn,more %O A169867 1,1 %A A169867 _N. J. A. Sloane_, Jun 27 2010, following a posting from Eric Angelini to the Sequence Fans Mailing List, Jun 22, 2010