A267022 Number of nX(n+2) arrays of permutations of n+2 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, 35, 257, 4835, 172169, 13122646, 2166450939

Offset

1,2

Comments

Superdiagonal 2 of A267019.

Links

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

Example

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

Crossrefs

Cf. A267019.

Sequence in context: A113941 A067238 A372927 * A145014 A090646 A220929

Adjacent sequences: A267019 A267020 A267021 * A267023 A267024 A267025

Keyword

nonn

Author

R. H. Hardin, Jan 09 2016

Status

approved