A295090 - OEIS

A295090

Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 3 1's.

1, 5, 33, 578, 21185, 1767431, 329926211, 137994394960, 129350877831211, 271756998888328388, 1279500367201581413204, 13501456561909863649426230

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

OFFSET

1,2

COMMENTS

Diagonal of A295097.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 14 2017

STATUS

approved