A264861 Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 6 and columns nondecreasing modulo 7.

1, 5, 30, 839, 15000, 530302, 7041672, 211818498, 5213013996

Offset

1,2

Comments

Column 3 of A264862.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
..7..8..2....0..1..9....7..1..3....0..7..8....0..7..8....0..1..9....0..7.10
..0..1.10....7..8..2....0..8.10....1..9..3....1..2..3....7..8..3....1..2..3
..9..3.11....3..4.10....2..9..4....2..4.10....9.10..4....2..4.10....8..9..4
..6..4..5....6..5.11....6..5.11....6.11..5....6..5.11....6.11..5....6.11..5

Crossrefs

Cf. A264862.

Sequence in context: A052172 A058783 A203769 * A264864 A297472 A299129

Adjacent sequences: A264858 A264859 A264860 * A264862 A264863 A264864

Keyword

nonn

Author

R. H. Hardin, Nov 26 2015

Status

approved