A317112 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 142, 5157, 392393, 67247490, 25956605294, 22069906835089, 42518510891269917

Offset

1,2

Comments

Diagonal of A317118.

Links

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

Example

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

Crossrefs

Cf. A317118.

Sequence in context: A295242 A305763 A180357 * A320396 A112464 A227875

Adjacent sequences: A317109 A317110 A317111 * A317113 A317114 A317115

Keyword

nonn

Author

R. H. Hardin, Jul 21 2018

Status

approved