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 A177318 #15 May 16 2020 01:34:29 %S A177318 1,2,86,10010,1543862,276285002,54331653686,11408205434138, %T A177318 2514046004253110,574996024253854586,135442141147145037086, %U A177318 32677132473420748546466,8041851882854648557516118,2012484136612620102100796090,510873291048466091968494930086 %N A177318 Number of permutations of n copies of 1..6 with all adjacent differences <= 1 in absolute value. %H A177318 Andrew Howroyd, <a href="/A177318/b177318.txt">Table of n, a(n) for n = 0..200</a> %Y A177318 Row n=6 of A331562. %K A177318 nonn %O A177318 0,2 %A A177318 _R. H. Hardin_, May 06 2010 %E A177318 a(0)=1 prepended by _Alois P. Heinz_, Jan 20 2020 %E A177318 a(11)-a(12) from _Alois P. Heinz_, Jan 22 2020 %E A177318 Terms a(13) and beyond from _Andrew Howroyd_, May 15 2020