A299515 Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 1, 12, 8, 285, 12411, 902141, 310347496, 249358437986, 595135127486520

Offset

1,3

Comments

Diagonal of A299521.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A299521.

Sequence in context: A338809 A038334 A101501 * A326927 A338289 A018870

Adjacent sequences: A299512 A299513 A299514 * A299516 A299517 A299518

Keyword

nonn

Author

R. H. Hardin, Feb 11 2018

Status

approved