A300090 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 7, 56, 1301, 43848, 3273425, 616964357, 279529477217

Offset

1,2

Comments

Diagonal of A300096.

Links

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

Example

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

Crossrefs

Cf. A300096.

Sequence in context: A320112 A284380 A082714 * A324984 A106112 A260831

Adjacent sequences: A300087 A300088 A300089 * A300091 A300092 A300093

Keyword

nonn

Author

R. H. Hardin, Feb 24 2018

Status

approved