A296644 Number of n X n 0..1 arrays with each 1 adjacent to 0, 1 or 3 king-move neighboring 1's.

2, 12, 111, 3159, 212537, 29547816, 10730354337, 9020738234108, 17473595660728954, 81540413109294209581, 892006283570909271440251

Offset

1,1

Comments

Diagonal of A296651.

Links

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

Example

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

Crossrefs

Cf. A296651.

Sequence in context: A158832 A372158 A264916 * A235860 A317208 A207778

Adjacent sequences: A296641 A296642 A296643 * A296645 A296646 A296647

Keyword

nonn

Author

R. H. Hardin, Dec 17 2017

Status

approved