A297714 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1's.

1, 10, 145, 4212, 512354, 183324631, 154327332017, 362685079640486, 2553300741336194602

Offset

1,2

Comments

Diagonal of A297720.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A297720.

Sequence in context: A305969 A081697 A134526 * A055761 A295524 A095889

Adjacent sequences: A297711 A297712 A297713 * A297715 A297716 A297717

Keyword

nonn

Author

R. H. Hardin, Jan 04 2018

Status

approved