A317459 Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 16, 1429, 386855, 426934467, 1798167135483, 29212515031084662, 1822743346281286133973, 437041238063851834989854827

Offset

1,2

Comments

Diagonal of A317465.

Links

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

Example

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

Crossrefs

Cf. A317465.

Sequence in context: A132559 A304761 A316507 * A080273 A096404 A111824

Adjacent sequences: A317456 A317457 A317458 * A317460 A317461 A317462

Keyword

nonn

Author

R. H. Hardin, Jul 28 2018

Status

approved