A268114 Number of n X n arrays containing n copies of 0..n-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, 3, 8, 25, 111, 761, 9204, 194567, 7088277, 450354517

Offset

1,2

Comments

Diagonal of A268115.

Links

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

Example

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

Crossrefs

Cf. A268115.

Sequence in context: A184325 A051403 A004205 * A097713 A009392 A130648

Adjacent sequences: A268111 A268112 A268113 * A268115 A268116 A268117

Keyword

nonn

Author

R. H. Hardin, Jan 26 2016

Status

approved