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 A227660 #5 Jul 19 2013 17:48:02 %S A227660 1,1,64,123208,1831288096,122911984813568,27297846037161958056, %T A227660 16391903881902996952724768,23066495371480810626495005438496, %U A227660 68371528221534300846360580266415146176,392997779138060823651445903318712755280168960,4100456330337958604264976205090832646574842298883968 %N A227660 Number of lattice paths from {6}^n to {0}^n using steps that decrement one component by 1 such that for each point (p_1,p_2,...,p_n) we have abs(p_{i}-p_{i+1}) <= 1. %e A227660 a(2) = 2^6 = 64. %Y A227660 Row n=6 of A227655. %Y A227660 Cf. A000079. %K A227660 nonn %O A227660 0,3 %A A227660 _Alois P. Heinz_, Jul 19 2013