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A316809 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 0
1, 8, 227, 19816, 5391628, 4537910922, 11834952392431, 95718597001627353, 2398617698972252323323 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A316815.

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..0. .0..0..0..0..0. .0..0..0..0..0

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

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

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

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

CROSSREFS

Cf. A316815.

Sequence in context: A189445 A193786 A213799 * A299655 A033508 A320365

Adjacent sequences:  A316806 A316807 A316808 * A316810 A316811 A316812

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 14 2018

STATUS

approved

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Last modified November 22 06:14 EST 2019. Contains 329388 sequences. (Running on oeis4.)