A295710 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1, 2 or 4 1's.

2, 16, 385, 31985, 9056598, 8705322572, 28373170135641, 313669710008734662, 11762368573382093623080, 1496099103269907922278909905, 645462222454558476245469903282979

Offset

1,1

Comments

Diagonal of A295716.

Links

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

Example

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

Crossrefs

Cf. A295716.

Sequence in context: A375059 A172149 A340563 * A012390 A009613 A012388

Adjacent sequences: A295707 A295708 A295709 * A295711 A295712 A295713

Keyword

nonn

Author

R. H. Hardin, Nov 26 2017

Status

approved