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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

%I #3 Nov 17 2015 18:05:45

%S 1,3,24,316,6080,149824,5728896,259780608,14154310656,1054215834624

%N Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 3.

%C Row 2 of A264560.

%e Some solutions for n=4

%e ..0..2..4..3....6..5..1..3....6..0..7..3....0..2..6..4....6..2..4..0

%e ..6..5..7..1....0..2..4..7....2..4..1..5....7..5..3..1....3..5..1..7

%Y Cf. A264560.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 17 2015

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Last modified May 19 08:05 EDT 2024. Contains 372666 sequences. (Running on oeis4.)