A317424 - OEIS

A317424

Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 14, 97, 1097, 9116, 135880, 3452903, 95798175, 3910778957, 254073667410

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

OFFSET

1,2

COMMENTS

Diagonal of A317429.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 27 2018

STATUS

approved