A264645 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 4.

1, 6, 149, 5080, 364544, 46305472, 6958619648

Offset

1,2

Comments

Row 3 of A264643.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=4
..9..0..4..1....4..1..5..8....0..4.10..8....9..0..6..4....0.11..5..8
.11..2..8..5....0..9..3..2....9..1..7..5...10..1..2..8....4..7..1..2
..3..6..7.10....6.10..7.11....6..3.11..2....3..7.11..5....9..3..6.10

Crossrefs

Cf. A264643.

Sequence in context: A199226 A012791 A347842 * A089480 A056427 A056418

Adjacent sequences: A264642 A264643 A264644 * A264646 A264647 A264648

Keyword

nonn

Author

R. H. Hardin, Nov 19 2015

Status

approved