A267552 Number of n X n arrays containing n copies of 0..n-1 with every element equal to or 1 greater than any north or northeast neighbors modulo n and the upper left element equal to 0.

1, 3, 6, 15, 55, 279, 2033, 21772, 345843, 8152180, 287657713

Offset

1,2

Comments

Diagonal of A267553.

Links

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

Example

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

Crossrefs

Cf. A267553.

Sequence in context: A230950 A370888 A327437 * A241269 A102356 A208662

Adjacent sequences: A267549 A267550 A267551 * A267553 A267554 A267555

Keyword

nonn

Author

R. H. Hardin, Jan 17 2016

Status

approved