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A264558 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 3. 0
1, 3, 15, 156, 2032, 30912, 737280, 19491840, 585019584, 26539425792, 1275815411712, 65050879721472 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A264560.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

..0..7....6..1....6..3....6..3....0..6....0..6....6..4....6..3....0..3....6..3

..6..4....3..7....0..7....0..1....4..3....7..3....3..7....0..1....6..1....0..4

..3..1....0..5....4..1....2..4....5..1....2..4....0..2....4..7....7..5....1..7

..2..5....4..2....2..5....5..7....2..7....5..1....1..5....2..5....4..2....2..5

CROSSREFS

Cf. A264560.

Sequence in context: A317667 A228901 A195226 * A136519 A102556 A016065

Adjacent sequences:  A264555 A264556 A264557 * A264559 A264560 A264561

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2015

STATUS

approved

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Last modified June 26 04:09 EDT 2019. Contains 324369 sequences. (Running on oeis4.)