A266024 Number of nX7 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors exactly one smaller than itself.

25, 719, 3394, 110924, 3254726, 63460724, 1577145547, 38948760562, 916245375526, 22100022039548, 535029907435345, 12865137927698631

Offset

1,1

Comments

Column 7 of A266025.

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Cf. A266025.

Sequence in context: A215017 A266100 A369141 * A217996 A246906 A286439

Adjacent sequences: A266021 A266022 A266023 * A266025 A266026 A266027

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved