A317037 Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 14, 141, 6188, 393048, 302924053, 789775871803, 5059633703751332

Offset

1,2

Comments

Diagonal of A317043.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A317043.

Sequence in context: A058072 A027304 A070135 * A317691 A067857 A027832

Adjacent sequences: A317034 A317035 A317036 * A317038 A317039 A317040

Keyword

nonn

Author

R. H. Hardin, Jul 19 2018

Status

approved