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A316870 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 0
1, 8, 99, 2931, 191678, 30894538, 11836970493, 10702669011883, 23392038065623330 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A316876.

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

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

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

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

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

CROSSREFS

Cf. A316876.

Sequence in context: A293145 A305919 A286841 * A181034 A324067 A083227

Adjacent sequences:  A316867 A316868 A316869 * A316871 A316872 A316873

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 15 2018

STATUS

approved

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Last modified January 21 01:45 EST 2022. Contains 350473 sequences. (Running on oeis4.)