A266039 Number of 7Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than itself.

1, 28399, 4281953, 1092258910, 2834665076351, 3378465528248312, 2672754315229290867, 2885006038907419657005, 3406933202847384254604064, 3651897242188721504759323539, 3891936445111406106603971681928

Offset

1,2

Comments

Row 7 of A266033.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A266033.

Sequence in context: A234087 A049052 A355712 * A202614 A270855 A250992

Adjacent sequences: A266036 A266037 A266038 * A266040 A266041 A266042

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved