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URL: https://oeis.org/A264730

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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
OFFSET
1,2
COMMENTS
Row 3 of A264728.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 22 2015
STATUS
approved