A299302 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 4, 56, 1024, 55390, 6525374, 1227812226, 723886147451, 1084184652392138

Offset

1,2

Comments

Diagonal of A299307.

Links

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

Example

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

Crossrefs

Cf. A299307.

Sequence in context: A326289 A369534 A078533 * A327199 A358886 A371678

Adjacent sequences: A299299 A299300 A299301 * A299303 A299304 A299305

Keyword

nonn

Author

R. H. Hardin, Feb 06 2018

Status

approved