A303518 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 2785, 49740, 377020, 5520182, 130480638, 2346396384, 36337215370, 621454623913, 11212991139339, 196019654779374, 3364469109355161, 58479744323851739, 1023251199975846576, 17836187188799591784

Offset

1,1

Comments

Row 7 of A303513.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0
..0..1..0..1..0. .0..0..0..0..0. .0..0..0..1..0. .0..1..0..1..0
..1..1..0..1..0. .0..1..1..1..1. .0..1..0..1..0. .0..0..0..0..1
..0..0..0..0..1. .0..1..1..1..1. .0..1..1..0..0. .0..1..0..1..1
..1..0..0..0..0. .1..0..1..0..0. .0..1..1..1..0. .0..1..0..1..0
..0..0..0..1..0. .1..1..1..1..1. .0..1..0..1..0. .1..0..0..1..0
..0..1..0..0..0. .1..0..1..0..1. .0..1..0..1..0. .0..1..0..0..0

Crossrefs

Cf. A303513.

Sequence in context: A302328 A303021 A302825 * A240483 A240635 A297372

Adjacent sequences: A303515 A303516 A303517 * A303519 A303520 A303521

Keyword

nonn

Author

R. H. Hardin, Apr 25 2018

Status

approved