A316546 Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 10, 42, 251, 1811, 18978, 336604, 7870292, 267729787, 13016021132

Offset

1,2

Comments

Diagonal of A316552.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A316552.

Sequence in context: A271202 A186031 A305246 * A187877 A328605 A122173

Adjacent sequences: A316543 A316544 A316545 * A316547 A316548 A316549

Keyword

nonn

Author

R. H. Hardin, Jul 06 2018

Status

approved