A266853 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, west, northeast or southeast neighbor modulo n and the upper left element equal to 0.

1, 0, 1, 44, 6850, 3070032, 3287263919, 5468455977296

Offset

1,4

Comments

Column 3 of A266854.

Links

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

Example

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

Crossrefs

Cf. A266854.

Sequence in context: A078279 A268548 A203974 * A323315 A007105 A180842

Adjacent sequences: A266850 A266851 A266852 * A266854 A266855 A266856

Keyword

nonn

Author

R. H. Hardin, Jan 04 2016

Status

approved