A304303 - OEIS

A304303

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

1, 8, 77, 1137, 26548, 989406, 55773947, 4882896349, 654105710575

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

OFFSET

1,2

COMMENTS

Diagonal of A304310.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 10 2018

STATUS

approved