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A264726 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 6. 0

%I

%S 1,2,3,12,69,278,2524,27024,250688,3721984,56111104,835883008,

%T 17920733184,437473529856,9120031211520,270263516958720

%N Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 6.

%C Column 2 of A264728.

%e Some solutions for n=6

%e ..0..6....6..7....6..7....0..6....6..7....2..6....8..0....2..6....6..7....8..0

%e ..1..7....0..2....0..2....2..7....0..8....8..0....2..6....8..0....0..1....2..6

%e ..4..8....1..3....1..3....8..1....1..2....4..1....9..1....9..1....8..2....9..1

%e .10..2....8.10....8.10....9..3....9..3...10..7...10..7....4..7....9..3....4..7

%e ..5..9....9.11....9..5...10.11...10.11....5..9....4..3...11..3....4.10...11..3

%e .11..3....4..5....4.11....4..5....4..5...11..3....5.11....5.10....5.11....5.10

%Y Cf. A264728.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 22 2015

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Last modified February 3 15:17 EST 2023. Contains 360035 sequences. (Running on oeis4.)