A264644 Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 4.

1, 1, 8, 55, 572, 5928, 113808, 2536688, 79981184, 2501785344, 102724061184, 4063172935680, 228978765692928

Offset

1,3

Comments

Row 2 of A264643.

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=4
..4..1..2..5....0..6..1..4....0..7..1..4....3..0..6..1....0..7..4..1
..0..3..6..7....3..7..2..5....6..3..5..2....7..4..2..5....6..3..2..5

Crossrefs

Cf. A264643.

Sequence in context: A264342 A230963 A209114 * A144748 A160429 A003722

Adjacent sequences: A264641 A264642 A264643 * A264645 A264646 A264647

Keyword

nonn

Author

R. H. Hardin, Nov 19 2015

Status

approved