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 A264793 #3 Nov 25 2015 07:44:39 %S A264793 2,15,170,3089,106568,4676432,252331392,19898286080 %N A264793 Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 7. %C A264793 Column 3 of A264794. %e A264793 Some solutions for n=5 %e A264793 ..2.14..9....0..8..7....9..1..7....0..7..9....2..8.14...14..1..7...14..0..7 %e A264793 .10..0..3...14..1..9...10..8..0....8.14..2....9..1..7....0..9..3....8..3..1 %e A264793 ..4..7.11...10..2.11...12..2.14....3..1.11...10..4..0....8.10.11....2.11..9 %e A264793 .12..8..6....3..5.13....6..4..3...10..4..5....5.11..3....2.12..4...10..4..5 %e A264793 ..5..1.13....4.12..6...13..5.11....6.12.13...12..6.13....6.13..5...12..6.13 %Y A264793 Cf. A264794. %K A264793 nonn %O A264793 1,1 %A A264793 _R. H. Hardin_, Nov 25 2015