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A317260 Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 5, 10, 74, 718, 7477, 219131, 13595141, 1430955986, 323294486785 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A317266.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317266.

Sequence in context: A120834 A089745 A316305 * A111992 A325583 A344194

Adjacent sequences:  A317257 A317258 A317259 * A317261 A317262 A317263

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 25 2018

STATUS

approved

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Last modified January 26 23:54 EST 2022. Contains 350601 sequences. (Running on oeis4.)