A266631 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, west, southeast or southwest neighbor modulo n and the upper left element equal to 0.

1, 0, 1, 64, 6342, 3030929, 3232725244, 5451050692400

Offset

1,4

Comments

Column 3 of A266632.

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=4
..0..2..1....0..3..1....0..0..2....0..0..2....0..2..1....0..2..1....0..2..0
..3..2..0....0..2..1....0..2..1....2..0..2....3..2..0....2..1..3....2..0..2
..3..1..3....3..1..3....2..1..3....1..3..1....3..1..0....1..0..3....1..3..1
..1..0..2....2..0..2....1..3..3....3..1..3....2..1..3....0..3..2....1..3..3

Crossrefs

Cf. A266632.

Sequence in context: A009823 A222100 A223265 * A085525 A349506 A264188

Adjacent sequences: A266628 A266629 A266630 * A266632 A266633 A266634

Keyword

nonn

Author

R. H. Hardin, Jan 01 2016

Status

approved