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A264820 Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 7. 0
1, 4, 59, 1644, 83599, 6680669, 731477306 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A264818.

LINKS

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

EXAMPLE

Some solutions for n=5

..9..0.10..7.14....0.12.14.11..8...12..0..7..1..4....9..7..4.14..8

..3..1..4..2..8....7.13.10..4..1...13.14..2..8.11....3..0.12..1.10

.12..6.13..5.11....9..6..3..5..2....6..3..9.10..5....6.13..5..2.11

CROSSREFS

Cf. A264818.

Sequence in context: A280668 A198508 A126754 * A194534 A331712 A026586

Adjacent sequences:  A264817 A264818 A264819 * A264821 A264822 A264823

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 25 2015

STATUS

approved

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Last modified November 29 18:41 EST 2021. Contains 349416 sequences. (Running on oeis4.)