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A264730 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 6. 0
1, 3, 48, 663, 23096, 1602048, 165778944, 13350330368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A264728.

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=5

.12..0..2.14..6....8.12..0..6..7....0.12.13..1..7....0.12..1..6..2

..8.13..9..5..7....4.13..1..2..3...10..6.14..2..3....8..9.13..7..3

..4..1.10.11..3....5..9.14.10.11....4..8..9..5.11....4..5.10.14.11

CROSSREFS

Cf. A264728.

Sequence in context: A140650 A081540 A294829 * A024042 A007654 A001080

Adjacent sequences:  A264727 A264728 A264729 * A264731 A264732 A264733

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 22 2015

STATUS

approved

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Last modified February 17 17:52 EST 2019. Contains 320222 sequences. (Running on oeis4.)