A268116 Number of (n+1)Xn arrays containing n copies of 0..n+1-1 with every element equal to or 1 greater than any north or west neighbors modulo n and the upper left element equal to 0.

1, 2, 5, 15, 67, 457, 5628, 119908, 4350527

Offset

1,2

Comments

Subdiagonal 1 of A268115.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=6
..0..1..2..2..3..4....0..1..1..2..3..4....0..0..0..1..1..2....0..0..1..1..2..3
..1..2..3..3..4..5....1..2..2..3..4..5....0..1..1..1..2..3....0..1..1..2..3..4
..2..2..3..4..5..6....2..3..3..4..5..6....1..2..2..2..3..4....1..2..2..3..4..5
..2..3..4..5..6..0....2..3..4..5..6..6....2..3..3..3..4..5....1..2..3..4..5..6
..3..4..5..6..0..1....3..4..5..6..0..0....3..4..4..4..5..6....2..3..4..5..6..6
..4..5..6..0..0..1....4..5..6..0..0..1....4..5..5..5..6..0....3..4..5..5..6..0
..5..6..6..0..1..1....5..6..0..1..1..2....5..6..6..6..6..0....4..5..6..6..0..0

Crossrefs

Cf. A268115.

Sequence in context: A166355 A031154 A270534 * A268123 A158079 A090091

Adjacent sequences: A268113 A268114 A268115 * A268117 A268118 A268119

Keyword

nonn

Author

R. H. Hardin, Jan 26 2016

Status

approved