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A317112 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 8, 142, 5157, 392393, 67247490, 25956605294, 22069906835089, 42518510891269917 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A317118.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317118.

Sequence in context: A295242 A305763 A180357 * A320396 A112464 A227875

Adjacent sequences:  A317109 A317110 A317111 * A317113 A317114 A317115

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 21 2018

STATUS

approved

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Last modified October 17 02:45 EDT 2021. Contains 348048 sequences. (Running on oeis4.)