A299328 Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 1, 8, 263, 46286, 27685946, 65181402152, 567774280392040, 18419330490239501061

Offset

1,3

Comments

Diagonal of A299334.

Links

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

Example

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

Crossrefs

Cf. A299334.

Sequence in context: A300734 A081058 A003386 * A098275 A326920 A221606

Adjacent sequences: A299325 A299326 A299327 * A299329 A299330 A299331

Keyword

nonn

Author

R. H. Hardin, Feb 07 2018

Status

approved