A305955 - OEIS

A305955

Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

0, 7, 132, 11142, 2617757, 1909062568, 4251930563544, 29035257774709570, 607160473609338803438

OFFSET

1,2

COMMENTS

Diagonal of A305961.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 15 2018

STATUS

approved