A266831 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, west or northwest neighbor modulo n and the upper left element equal to 0.

1, 0, 2, 95, 27315, 18101569, 20154412479, 35620013177528

Offset

1,3

Comments

Column 3 of A266832.

Links

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

Example

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

Crossrefs

Cf. A266832.

Sequence in context: A302577 A346654 A324165 * A281029 A282436 A069121

Adjacent sequences: A266828 A266829 A266830 * A266832 A266833 A266834

Keyword

nonn

Author

R. H. Hardin, Jan 04 2016

Status

approved