A267736 Number of n X n arrays containing n copies of 0..n-1 with every element equal to or 1 greater than any west or northeast neighbors modulo n and the upper left element equal to 0.

1, 3, 17, 123, 1811, 55105, 3562990, 491779927

Offset

1,2

Comments

Diagonal of A267742.

Links

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

Example

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

Crossrefs

Cf. A267742.

Sequence in context: A074543 A216314 A330803 * A129115 A246963 A093460

Adjacent sequences: A267733 A267734 A267735 * A267737 A267738 A267739

Keyword

nonn

Author

R. H. Hardin, Jan 20 2016

Status

approved