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A264562 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 3. 0
1, 15, 888, 84672, 17444160, 5356808640, 2800372248576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A264560.

LINKS

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

EXAMPLE

Some solutions for n=4

..6..7..9..3....0.10..6..9....6.10..0..1....0.10..6..4....6..9..7..1

..4.10..2..0....7..1..3.11....9..5..3..7....2.11..3..7....0..3.11..5

..8..1..5.11....2..8..4..5....4..2..8.11....8..5..9..1...10..4..2..8

CROSSREFS

Cf. A264560.

Sequence in context: A208304 A258796 A232364 * A211109 A249963 A157462

Adjacent sequences:  A264559 A264560 A264561 * A264563 A264564 A264565

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2015

STATUS

approved

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Last modified October 28 04:43 EDT 2021. Contains 348313 sequences. (Running on oeis4.)