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 A264715 #3 Nov 21 2015 08:33:43 %S A264715 1,2,2,18,116,627,6211,59011,449824,5256100,90734544,1163859524, %T A264715 24333174896,578216191424,11292787466976 %N A264715 Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 5 and columns nondecreasing modulo 6. %C A264715 Row 2 of A264714. %e A264715 Some solutions for n=6 %e A264715 ..0.11..1..6..8..9...10..0..1..6..2..7....0..5..6..1..3..8....0.11..1..6..7..3 %e A264715 .10..5..7..2..3..4....5.11..3..8..4..9...10.11..7..2..9..4...10..5..2..8..4..9 %Y A264715 Cf. A264714. %K A264715 nonn %O A264715 1,2 %A A264715 _R. H. Hardin_, Nov 21 2015