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A264710
Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 6.
0
1, 1, 8, 84, 800, 15360, 357696, 6873984, 262813248, 12288817152, 432621305856, 28148895055872, 2108257586380800
OFFSET
1,3
COMMENTS
Row 2 of A264709.
EXAMPLE
Some solutions for n=6
..6..0..1..7..4.10....0..6..3..9..1..8....6..3..1..4..2..8....6..0.10..4..1..7
..3..9..8..2..5.11....7..4.10.11..2..5....0..9..7.10.11..5....9..3.11..5..2..8
CROSSREFS
Cf. A264709.
Sequence in context: A307829 A039939 A199907 * A143868 A130591 A166483
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 21 2015
STATUS
approved