A317727 Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 7, 161, 19208, 8931649, 16360102553, 119470846769818, 3467887921398599259, 400246130624951550643193, 183679716438894408166683690328, 335165985967839939262823279518153979

Offset

1,2

Comments

Diagonal of A317733.

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

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

Crossrefs

Cf. A317733.

Sequence in context: A208263 A160454 A217241 * A142163 A201179 A218998

Adjacent sequences: A317724 A317725 A317726 * A317728 A317729 A317730

Keyword

nonn

Author

R. H. Hardin, Aug 05 2018

Status

approved