A296629 - OEIS

A296629

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

2, 8, 71, 1444, 67488, 7121315, 1700240351, 918770773688, 1123781080551251, 3111403698927107015, 19501463789775958005296, 276719237565795526825364758

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OFFSET

1,1

COMMENTS

Diagonal of A296635.

LINKS

EXAMPLE

Some solutions for n=5

..1..0..0..1..1. .0..0..0..1..1. .0..0..0..1..0. .0..0..0..0..0

..0..1..1..0..1. .1..1..0..1..0. .0..1..0..0..0. .0..0..0..0..1

..1..0..0..1..0. .1..0..0..0..1. .1..1..0..1..0. .0..0..0..0..0

..1..0..0..1..0. .0..0..0..0..0. .0..0..1..1..0. .1..0..0..0..0

..1..1..1..0..0. .1..0..0..0..1. .0..1..1..1..0. .0..0..1..0..0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2017

STATUS

approved