login
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
1, 4, 59, 1644, 83599, 6680669, 731477306
OFFSET
1,2
COMMENTS
Row 3 of A264818.
EXAMPLE
Some solutions for n=5:
9 0 10 7 14 0 12 14 11 8 12 0 7 1 4 9 7 4 14 8
3 1 4 2 8 7 13 10 4 1 13 14 2 8 11 3 0 12 1 10
12 6 13 5 11 9 6 3 5 2 6 3 9 10 5 6 13 5 2 11
CROSSREFS
Cf. A264818.
Sequence in context: A280668 A198508 A126754 * A194534 A331712 A026586
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Nov 25 2015
STATUS
approved