A304340 - OEIS

A304340

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

1, 4, 27, 290, 6373, 135445, 4921043, 343449680, 30008468246, 4458350461574

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

OFFSET

1,2

COMMENTS

Diagonal of A304347.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 11 2018

STATUS

approved