A299452 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 7, 48, 1015, 19041, 750083, 67847199, 10455199270, 2719125337850

Offset

1,2

Comments

Diagonal of A299458.

Links

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

Example

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

Crossrefs

Cf. A299458.

Sequence in context: A025530 A106114 A217039 * A110420 A210244 A123789

Adjacent sequences: A299449 A299450 A299451 * A299453 A299454 A299455

Keyword

nonn

Author

R. H. Hardin, Feb 10 2018

Status

approved