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 A264702 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 6. 0
 1, 3, 6, 36, 288, 2240, 20736, 264384, 2892672, 63452160, 1528823808, 36691771392, 941182156800, 29143203840000, 803229696000000, 36978425856000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 2 of A264704. LINKS EXAMPLE Some solutions for n=7 ..6..0....0..1....6..7....0..7...12..7...12..7....6..0...12..1....6..0....6.12 .12..7...12..2...12..1...12.13....0..1....0..1...12.13....6.13...12.13....0..7 .13..9....6..8....0.13....6..2....6.13....6..9....3..1....0..7....1..9...13..1 ..1..3....7..9....2..8....1..3....8..9...13..3....9..7....2..9....7..3....8..3 ..2..4...13..3....4..3....8..9....2..3....2..4....4..2....8.10....8..4....2..4 ..8.10....4.11...10..9....4.10...10..4....8.10...10..8....3..5....2..5....9..5 ..5.11...10..5....5.11...11..5....5.11....5.11...11..5....4.11...10.11...10.11 CROSSREFS Cf. A264704. Sequence in context: A240986 A120595 A048642 * A077532 A174666 A211893 Adjacent sequences:  A264699 A264700 A264701 * A264703 A264704 A264705 KEYWORD nonn AUTHOR R. H. Hardin, Nov 21 2015 STATUS approved

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Last modified August 12 04:46 EDT 2022. Contains 356067 sequences. (Running on oeis4.)