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A264561 Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 3. 0
1, 3, 24, 316, 6080, 149824, 5728896, 259780608, 14154310656, 1054215834624 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 2 of A264560.
LINKS
EXAMPLE
Some solutions for n=4
..0..2..4..3....6..5..1..3....6..0..7..3....0..2..6..4....6..2..4..0
..6..5..7..1....0..2..4..7....2..4..1..5....7..5..3..1....3..5..1..7
CROSSREFS
Cf. A264560.
Sequence in context: A138428 A047056 A343445 * A003236 A232693 A319939
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2015
STATUS
approved

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Last modified April 13 04:33 EDT 2024. Contains 371639 sequences. (Running on oeis4.)