A266885 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, northeast or northwest neighbor modulo n and the upper left element equal to 0.

1, 0, 1, 322, 52149, 33089774, 32230426133, 53280974043650

Offset

1,4

Comments

Column 3 of A266886.

Links

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

Example

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

Crossrefs

Cf. A266886.

Sequence in context: A234705 A324629 A234704 * A253368 A334182 A033524

Adjacent sequences: A266882 A266883 A266884 * A266886 A266887 A266888

Keyword

nonn

Author

R. H. Hardin, Jan 05 2016

Status

approved