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A317377 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 18, 123, 2089, 75405, 4726521, 569899203, 132364711390, 58207830722829, 48518983884550645, 77042834793060609587 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A317383.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317383.

Sequence in context: A346680 A292500 A228065 * A332748 A215691 A073511

Adjacent sequences:  A317374 A317375 A317376 * A317378 A317379 A317380

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 26 2018

STATUS

approved

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Last modified January 26 07:15 EST 2022. Contains 350573 sequences. (Running on oeis4.)