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A317699 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 25, 1719, 468002, 508895558, 2157266427366, 35375750998532860, 2234441612008121460906, 543166694783264652942675685 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A317703.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317703.

Sequence in context: A317061 A144229 A316926 * A284106 A063802 A276266

Adjacent sequences:  A317696 A317697 A317698 * A317700 A317701 A317702

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 04 2018

STATUS

approved

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Last modified May 22 06:04 EDT 2019. Contains 323475 sequences. (Running on oeis4.)