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%I #3 Nov 19 2015 07:27:37
%S 2,28,960,46656,4561920,829440000,218972160000,73903104000000
%N Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 4.
%C Column 3 of A264638.
%e Some solutions for n=4
%e ..8..0..9....8..4..0....4..8..0....4.10..9....0..4..8....0..4..9....2..8..4
%e ..6..4..1...10..5..9...10..6..1....0..6..5....6..1..5...10..8..5...10..0..5
%e .10..2..5....2..6..1....2..3..9....8..2..1....2..9..7....2..7..1....6.11..1
%e ..3.11..7....7..3.11...11..7..5....3..7.11...10.11..3....6.11..3....3..7..9
%Y Cf. A264638.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 19 2015
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