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A264705 Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 6. 0
1, 3, 15, 212, 3712, 96256, 3423168, 158521536, 8362014912, 635861560320, 51551078842368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 2 of A264704.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=6

..2..0..8.10..7..1....8..0..6..1..7..3....0..6..4..3..9..7....4..6..8..0..7..9

..4..6..9.11..5..3....4.10..2..5.11..9....8..2.10..5.11..1...10..2.11..5..1..3

CROSSREFS

Cf. A264704.

Sequence in context: A270354 A120601 A145272 * A117820 A126453 A007081

Adjacent sequences:  A264702 A264703 A264704 * A264706 A264707 A264708

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 21 2015

STATUS

approved

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Last modified September 16 12:41 EDT 2019. Contains 327113 sequences. (Running on oeis4.)