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 A129885 #5 Mar 30 2013 04:47:35
%S A129885 0,1,3,3,10,13,47,59
%N A129885 Sequence a_{t_n} arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition), where a_n = A129878, t_n = A129875.
%D A129885 Jocelyn Quaintance, Combinatoric Enumeration of Two-Dimensional Proper Arrays, Discrete Math., 307 (2007), 1844-1864.
%F A129885 See Quaintance reference for generating functions that produce A129872-A129886.
%K A129885 nonn,more
%O A129885 1,3
%A A129885 _N. J. A. Sloane_, May 26 2007