A266920 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, southwest or southeast neighbor modulo n and the upper left element equal to 0.

1, 0, 8, 376, 40298, 25499147, 28504890050, 49017350138134

Offset

1,3

Comments

Column 3 of A266921.

Links

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

Example

Some solutions for n=5
..0..4..0....0..1..0....0..1..2....0..4..4....0..3..4....0..4..1....0..3..1
..4..1..2....4..0..4....4..3..2....0..2..4....4..2..3....4..2..1....3..2..0
..4..0..1....3..2..2....4..0..4....0..1..3....2..0..2....3..2..3....2..0..3
..3..2..3....3..4..2....1..0..2....2..3..1....1..3..0....0..1..3....2..4..1
..2..1..3....1..3..1....3..3..1....1..2..3....1..1..4....4..0..2....4..4..1

Crossrefs

Cf. A266921.

Sequence in context: A221775 A206690 A349114 * A072447 A326877 A332138

Adjacent sequences: A266917 A266918 A266919 * A266921 A266922 A266923

Keyword

nonn

Author

R. H. Hardin, Jan 06 2016

Status

approved