%I #3 Nov 21 2015 08:19:44
%S 1,8,152,4544,202176,10964160,1200365568,150015836160,27805483008000
%N Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 6.
%C Column 3 of A264709.
%e Some solutions for n=4
%e ..0..6..2....9..0..6....0..6..7....6..7.10....9..6..7....6..0..7....3..6..0
%e ..3..7..8....3..1..2....1..8..2....0..1..4....3..0..2....1..8..2....9..1..7
%e ..9..1..4....4..7.10....3..9.11....8..2..5....4..1.10....9..3.11...10..2..8
%e .10..5.11....5..8.11....4.10..5....9..3.11...11..8..5...10..4..5....4..5.11
%Y Cf. A264709.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 21 2015