A298630 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 5, 2, 15, 34, 163, 462, 2134, 7520, 41965, 217707, 1299151, 7616244, 53563038

Offset

1,2

Comments

Diagonal of A298635.

Links

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

Example

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

Crossrefs

Cf. A298635.

Sequence in context: A283242 A246209 A297979 * A248258 A279150 A213582

Adjacent sequences: A298627 A298628 A298629 * A298631 A298632 A298633

Keyword

nonn

Author

R. H. Hardin, Jan 23 2018

Status

approved