A295246 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 3 1's.

2, 11, 183, 8271, 1081924, 403318354, 430246838462, 1312008367581053, 11440395910000265070, 285225326541505567932583, 20332459513033508982984463884

Offset

1,1

Comments

Diagonal of A295253.

Links

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

Example

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

Crossrefs

Cf. A295253.

Sequence in context: A089760 A288556 A353930 * A288564 A368561 A295646

Adjacent sequences: A295243 A295244 A295245 * A295247 A295248 A295249

Keyword

nonn

Author

R. H. Hardin, Nov 18 2017

Status

approved