A299808 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 4, 12, 476, 11460, 1881856, 1009387819, 1201130067486, 5391490611757566

Offset

1,2

Comments

Diagonal of A299814.

Links

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

Example

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

Crossrefs

Cf. A299814.

Sequence in context: A360498 A291098 A009506 * A085116 A104129 A144631

Adjacent sequences: A299805 A299806 A299807 * A299809 A299810 A299811

Keyword

nonn

Author

R. H. Hardin, Feb 19 2018

Status

approved