login
A264796
Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 7.
0
1, 6, 170, 9656, 1369408, 275062400, 89203565824
OFFSET
1,2
COMMENTS
Row 3 of A264794.
EXAMPLE
Some solutions for n=4
..0..8.11..7....0..2..8..7....8..0..3..7....0..2..8..7....0..1..9..7
..9..1..5..3...10..9..1.11....1..9.11..5...11..5..1..9....4..8.10..2
..2.10..6..4....6..4..3..5...10..2..4..6....4..6.10..3....6.11..5..3
CROSSREFS
Cf. A264794.
Sequence in context: A002884 A198176 A264358 * A266852 A266311 A323820
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2015
STATUS
approved