A317377 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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.

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 A359460

Adjacent sequences: A317374 A317375 A317376 * A317378 A317379 A317380

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 26 2018

STATUS

approved