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A264640 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 4. 0
1, 16, 960, 107568, 21565440, 10027929600, 7163873280000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A264638.

LINKS

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

EXAMPLE

Some solutions for n=4

..0..4..6..8....8..6..0..1....4..2..8..1....8..4..9..1....0..8..5..1

..2..1.11..9....4..2..5..9....0..6.10..9....0..6.10..5....4..6.10..9

.10..5..3..7...10..7.11..3...11..3..7..5....2..7.11..3....2..7.11..3

CROSSREFS

Cf. A264638.

Sequence in context: A276637 A211081 A197449 * A211086 A187802 A181199

Adjacent sequences:  A264637 A264638 A264639 * A264641 A264642 A264643

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 19 2015

STATUS

approved

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Last modified January 25 17:16 EST 2020. Contains 331245 sequences. (Running on oeis4.)