A299715 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 5, 46, 2545, 439647, 330958005, 971255866215, 10731593899905484, 447638115422401432896

Offset

1,2

Comments

Diagonal of A299721.

Links

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

Example

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

Crossrefs

Cf. A299721.

Sequence in context: A066998 A036246 A183240 * A377005 A000872 A307406

Adjacent sequences: A299712 A299713 A299714 * A299716 A299717 A299718

Keyword

nonn

Author

R. H. Hardin, Feb 17 2018

Status

approved