A301602 - OEIS

A301602

Number of n X n 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

1, 2, 2, 25, 330, 8888, 591585, 83224304, 23865691820, 14092825824108

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

OFFSET

1,2

COMMENTS

Diagonal of A301608.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 24 2018

STATUS

approved