A297756 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1's.

1, 2, 52, 1181, 109228, 59707529, 108229776807, 486950815286291, 7321785704464787533, 424569942925543143564742

Offset

1,2

Comments

Diagonal of A297762.

Links

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

Example

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

Crossrefs

Cf. A297762.

Sequence in context: A123803 A284767 A101930 * A174779 A215744 A099882

Adjacent sequences: A297753 A297754 A297755 * A297757 A297758 A297759

Keyword

nonn

Author

R. H. Hardin, Jan 05 2018

Status

approved