A296667 Number of n X n 0..1 arrays with each 1 adjacent to 0, 2 or 3 king-move neighboring 1's.

2, 10, 82, 2295, 213800, 40937523, 25499216805, 45685878532152, 202051384124690942, 2538862787057361542172

Offset

1,1

Comments

Diagonal of A296674.

Links

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

Example

Some solutions for n=4
..1..1..0..0. .1..0..1..1. .0..0..0..0. .0..0..1..0. .1..1..0..0
..1..0..0..1. .0..0..0..1. .1..0..0..1. .1..0..0..0. .0..1..0..0
..1..0..0..0. .1..0..0..0. .0..0..0..0. .0..0..1..0. .0..0..0..1
..1..1..0..1. .0..0..1..0. .0..0..1..0. .1..0..1..1. .0..0..1..1

Crossrefs

Cf. A296674.

Sequence in context: A375867 A281547 A111265 * A003093 A006679 A050390

Adjacent sequences: A296664 A296665 A296666 * A296668 A296669 A296670

Keyword

nonn

Author

R. H. Hardin, Dec 18 2017

Status

approved