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 A264716 #3 Nov 21 2015 08:34:01 %S A264716 1,2,40,803,23775,468540,17266449,741373873 %N A264716 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 5 and columns nondecreasing modulo 6. %C A264716 Row 3 of A264714. %e A264716 Some solutions for n=5 %e A264716 .10..0..6..1.14....0..1.12..7..2...10..0..6..1.12....0..6..1.13..8 %e A264716 ..5..7.12..8..9....6.11.13..9.14...11..2..7..3.13...11.12..2..7..3 %e A264716 .11..2.13..3..4...10..5..8..3..4....5..8.14..4..9....5.10..4.14..9 %Y A264716 Cf. A264714. %K A264716 nonn %O A264716 1,2 %A A264716 _R. H. Hardin_, Nov 21 2015