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A317216 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 0
0, 7, 133, 11378, 2762836, 2106680104, 4981964443017, 36636237693414092, 836922031617540197099 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A317222.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317222.

Sequence in context: A251577 A082164 A229464 * A119670 A003374 A001533

Adjacent sequences:  A317213 A317214 A317215 * A317217 A317218 A317219

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 23 2018

STATUS

approved

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Last modified November 30 02:42 EST 2020. Contains 338781 sequences. (Running on oeis4.)