A316507 Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 16, 1321, 317264, 295326468, 990266635029, 12088043573966128, 535440346291887704215

Offset

1,2

Comments

Diagonal of A316511.

Links

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

Example

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

Crossrefs

Cf. A316511.

Sequence in context: A002794 A132559 A304761 * A317459 A080273 A096404

Adjacent sequences: A316504 A316505 A316506 * A316508 A316509 A316510

Keyword

nonn

Author

R. H. Hardin, Jul 05 2018

Status

approved