A299562 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 57, 965, 24588, 997212, 60087975, 5576669621, 796438022548

Offset

1,2

Comments

Diagonal of A299567.

Links

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

Example

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

Crossrefs

Cf. A299567.

Sequence in context: A320977 A071540 A298764 * A299459 A300103 A358687

Adjacent sequences: A299559 A299560 A299561 * A299563 A299564 A299565

Keyword

nonn

Author

R. H. Hardin, Feb 12 2018

Status

approved