A297714 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Diagonal of A297720.

LINKS

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

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2018

STATUS

approved