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A264820 a(n) is the number of 3 X n arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 7. 0

%I

%S 1,4,59,1644,83599,6680669,731477306

%N a(n) is the number of 3 X n arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 7.

%C Row 3 of A264818.

%e Some solutions for n=5:

%e 9 0 10 7 14 0 12 14 11 8 12 0 7 1 4 9 7 4 14 8

%e 3 1 4 2 8 7 13 10 4 1 13 14 2 8 11 3 0 12 1 10

%e 12 6 13 5 11 9 6 3 5 2 6 3 9 10 5 6 13 5 2 11

%Y Cf. A264818.

%K nonn,more

%O 1,2

%A _R. H. Hardin_, Nov 25 2015

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Last modified January 25 17:35 EST 2022. Contains 350572 sequences. (Running on oeis4.)