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Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 6 and columns nondecreasing modulo 7.
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%I #3 Nov 26 2015 20:03:27

%S 1,5,30,839,16365,550479,8299492,275881482

%N Number of 3Xn arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 6 and columns nondecreasing modulo 7.

%C Row 3 of A264862.

%e Some solutions for n=4

%e ..7..8..9.11....0..7..2..8....0..8..9.10....0..1..7..8....7..1..9.10

%e ..0..1..3..4....1..9..3..4....7..1..2..3....2..3..9.10....0..8..2..4

%e ..6..2.10..5....6.10.11..5....6..4..5.11....6..4.11..5....6..3..5.11

%Y Cf. A264862.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 26 2015