cp's OEIS Frontend

A264702 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 6.

%I A264702 #3 Nov 21 2015 08:05:25
%S A264702 1,3,6,36,288,2240,20736,264384,2892672,63452160,1528823808,
%T A264702 36691771392,941182156800,29143203840000,803229696000000,
%U A264702 36978425856000000
%N A264702 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 6.
%C A264702 Column 2 of A264704.
%e A264702 Some solutions for n=7
%e A264702 ..6..0....0..1....6..7....0..7...12..7...12..7....6..0...12..1....6..0....6.12
%e A264702 .12..7...12..2...12..1...12.13....0..1....0..1...12.13....6.13...12.13....0..7
%e A264702 .13..9....6..8....0.13....6..2....6.13....6..9....3..1....0..7....1..9...13..1
%e A264702 ..1..3....7..9....2..8....1..3....8..9...13..3....9..7....2..9....7..3....8..3
%e A264702 ..2..4...13..3....4..3....8..9....2..3....2..4....4..2....8.10....8..4....2..4
%e A264702 ..8.10....4.11...10..9....4.10...10..4....8.10...10..8....3..5....2..5....9..5
%e A264702 ..5.11...10..5....5.11...11..5....5.11....5.11...11..5....4.11...10.11...10.11
%Y A264702 Cf. A264704.
%K A264702 nonn
%O A264702 1,2
%A A264702 _R. H. Hardin_, Nov 21 2015