A305446 - OEIS

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A305446

Number of nXn 0..1 arrays with every element unequal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 7, 26, 1275, 5443, 222961, 10709608, 362139243, 59746224393

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

OFFSET

1,2

COMMENTS

Diagonal of A305452.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305452.

Sequence in context: A120120 A126472 A019059 * A334793 A175198 A272530

Adjacent sequences: A305443 A305444 A305445 * A305447 A305448 A305449

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 01 2018

STATUS

approved