A317511 Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 8, 255, 32256, 16198017, 32289056648, 255495837970145, 8025093993437265376, 1000586105494959749616796, 495218382735595839495210771842, 972919685981025490418238840100646750

Offset

1,2

Comments

Diagonal of A317517.

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Cf. A317517.

Sequence in context: A053717 A267250 A034674 * A300176 A372670 A291850

Adjacent sequences: A317508 A317509 A317510 * A317512 A317513 A317514

Keyword

nonn

Author

R. H. Hardin, Jul 30 2018

Status

approved