A316283 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 42, 354, 7973, 205946, 10464990, 1363011634, 297013482603, 129932663244527

Offset

1,2

Comments

Diagonal of A316289.

Links

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

Example

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

Crossrefs

Cf. A316289.

Sequence in context: A020068 A266474 A238723 * A236328 A284337 A052666

Adjacent sequences: A316280 A316281 A316282 * A316284 A316285 A316286

Keyword

nonn

Author

R. H. Hardin, Jun 28 2018

Status

approved