A295978 Number of n X n 0..1 arrays with each 1 adjacent to 2 or 3 king-move neighboring 1's.

1, 6, 44, 518, 62702, 10239175, 3710803701, 5908904429141, 19661826179139454, 159706594064013413371, 4070881939232241860985279

Offset

1,2

Comments

Diagonal of A295985.

Links

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

Example

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

Crossrefs

Cf. A295985.

Sequence in context: A001852 A352843 A284218 * A194928 A267074 A271963

Adjacent sequences: A295975 A295976 A295977 * A295979 A295980 A295981

Keyword

nonn

Author

R. H. Hardin, Dec 01 2017

Status

approved