A264706 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 6.

1, 6, 296, 26304, 4689792, 1263257856, 603321053184

Offset

1,2

Comments

Row 3 of A264704.

Links

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

Example

Some solutions for n=4
.10..8..0..7....8..6..0..7....6..0..8..2....4..0..2..1....0..1..7..9
..4..2..6..1....4..1..5..9....4..7..9..3...10..6..8..9....6..4..2..3
..5..3.11..9...10..2.11..3...10..1.11..5....5..7.11..3....8.10..5.11

Crossrefs

Cf. A264704.

Sequence in context: A042119 A196980 A197165 * A066718 A065947 A277168

Adjacent sequences: A264703 A264704 A264705 * A264707 A264708 A264709

Keyword

nonn

Author

R. H. Hardin, Nov 21 2015

Status

approved