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 A264713 #3 Nov 21 2015 08:32:56 %S A264713 1,2,40,815,22320,352181,8549705,286833177 %N A264713 Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 5 and columns nondecreasing modulo 6. %C A264713 Column 3 of A264714. %e A264713 Some solutions for n=5 %e A264713 ..6.12..7....0..1.12....0..6..2....0..1..6....6..1..7....6..1..7....0..6.14 %e A264713 ..0..1.13....6..8.13...12..7..8...12..2..7....0.13..8...12..2.13....1.12..2 %e A264713 ..2..9.14....7..2..9...13..3.14...13..8.14...12..2.14....0..3.14....7.13..3 %e A264713 .10..3..8....3.14..4....1..4..9....3..9..4....5.10..3....8..9..4....8..9..4 %e A264713 ..5.11..4...10..5.11...10..5.11....5.10.11...11..4..9....5.10.11....5.10.11 %Y A264713 Cf. A264714. %K A264713 nonn %O A264713 1,2 %A A264713 _R. H. Hardin_, Nov 21 2015