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%I #3 Nov 21 2015 08:20:39
%S 1,1,8,84,800,15360,357696,6873984,262813248,12288817152,432621305856,
%T 28148895055872,2108257586380800
%N Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 6.
%C Row 2 of A264709.
%e Some solutions for n=6
%e ..6..0..1..7..4.10....0..6..3..9..1..8....6..3..1..4..2..8....6..0.10..4..1..7
%e ..3..9..8..2..5.11....7..4.10.11..2..5....0..9..7.10.11..5....9..3.11..5..2..8
%Y Cf. A264709.
%K nonn
%O 1,3
%A _R. H. Hardin_, Nov 21 2015
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