A267554 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 north or northeast neighbors modulo n and the upper left element equal to 0.

1, 10, 20, 61, 287, 2041, 21781, 345853, 8152191, 287657725

Offset

1,2

Comments

Superdiagonal 1 of A267553.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A267553.

Sequence in context: A271512 A294473 A174183 * A337434 A328490 A131726

Adjacent sequences: A267551 A267552 A267553 * A267555 A267556 A267557

Keyword

nonn

Author

R. H. Hardin, Jan 17 2016

Status

approved