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 A264944 #3 Nov 29 2015 06:03:54 %S A264944 0,2,16108,730983420,102117302729744,36724170744914466520, %T A264944 29526013062983124375791088 %N A264944 Number of nX6 arrays of permutations of 6 copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0. %C A264944 Column 6 of A264945. %e A264944 Some solutions for n=3 %e A264944 ..0..1..0..2..0..2....0..1..2..0..2..1....0..1..0..1..0..2....0..1..2..1..0..2 %e A264944 ..0..1..0..1..2..1....1..0..1..2..1..0....2..0..2..0..1..2....0..1..0..2..0..1 %e A264944 ..2..1..2..1..2..0....2..0..2..1..2..0....1..2..0..1..2..1....2..0..2..1..2..1 %Y A264944 Cf. A264945. %K A264944 nonn %O A264944 1,2 %A A264944 _R. H. Hardin_, Nov 29 2015