A267337 Number of n X n arrays containing n copies of 0..n-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo n and the upper left element equal to 0.

1, 3, 5, 12, 36, 135, 649, 4277, 39472, 505780, 9112713

Offset

1,2

Comments

Diagonal of A267338.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A267338.

Sequence in context: A087610 A243013 A191636 * A308544 A307142 A291936

Adjacent sequences: A267334 A267335 A267336 * A267338 A267339 A267340

Keyword

nonn

Author

R. H. Hardin, Jan 13 2016

Status

approved