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 A264860 #4 Nov 26 2015 20:02:03 %S A264860 1,2,5,8,47,422,1625,14431,174215,1344400,9453914,132314974,990261166, %T A264860 10342102148,139753036064,1847657514232 %N A264860 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 6 and columns nondecreasing modulo 7. %C A264860 Column 2 of A264862. %e A264860 All solutions for n=4 %e A264860 ..0..1....0..1....7..2....7..1....0..7....7..1....0..2....0..7 %e A264860 ..7..3....7..2....0..3....0..2....1..2....0..3....7..3....1..3 %e A264860 ..2..4....3..4....1..4....3..4....3..4....2..4....1..4....2..4 %e A264860 ..6..5....6..5....6..5....6..5....6..5....6..5....6..5....6..5 %Y A264860 Cf. A264862. %K A264860 nonn %O A264860 1,2 %A A264860 _R. H. Hardin_, Nov 26 2015