login
A264711
Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 6.
0
1, 4, 152, 8064, 789696, 120512448, 29928517632
OFFSET
1,2
COMMENTS
Row 3 of A264709.
EXAMPLE
Some solutions for n=4
..0..1..7.10....0..6.10..7....0..9..1..7....9..6..0..7....0..9..4..7
..6..8..2.11....9..1..4..8....6..4.11..8....3..1..8..2....6..3.10..1
..3..9..4..5....3.11..5..2....3.10..5..2...10..4..5.11....8..5.11..2
CROSSREFS
Cf. A264709.
Sequence in context: A294826 A247115 A006439 * A279325 A158104 A244448
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 21 2015
STATUS
approved