A267021 Number of nX(n+1) arrays of permutations of n+1 copies of 0..n-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0.

1, 10, 59, 759, 18157, 912057, 100710495

Offset

1,2

Comments

Superdiagonal 1 of A267019.

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A267019.

Sequence in context: A326827 A054489 A219580 * A213346 A140890 A055714

Adjacent sequences: A267018 A267019 A267020 * A267022 A267023 A267024

Keyword

nonn

Author

R. H. Hardin, Jan 09 2016

Status

approved