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A264817
Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 7.
0
1, 8, 59, 743, 17869, 530230, 16961815, 1040174384
OFFSET
1,2
COMMENTS
Column 3 of A264818.
EXAMPLE
Some solutions for n=5
..9..0.14....0.10.14....0..1..7....7..1.14....7.14..8....0.14..8....0..7.10
.10..7..2....7..4..1....9..3.14....0..9..8....9..0..2....1..7..4...14..8.11
..3..8.11....2..5..8...12.10..8...10..5..2....3..1.10...10..2.11....1..2..5
.12..1..4....9.13.11....6.11..2....3..6.11....4..5.11...12..9..5....3..9.12
..6.13..5....3..6.12...13..4..5...12.13..4...12..6.13....6..3.13....6..4.13
CROSSREFS
Cf. A264818.
Sequence in context: A254662 A186362 A285231 * A032365 A250315 A074423
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2015
STATUS
approved