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A316442 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
0, 7, 57, 946, 43568, 3624515, 621643922, 235652502418, 182371905958510 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A316448.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316448.

Sequence in context: A122649 A051846 A231540 * A289876 A290847 A324420

Adjacent sequences:  A316439 A316440 A316441 * A316443 A316444 A316445

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 03 2018

STATUS

approved

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Last modified January 27 12:01 EST 2020. Contains 331295 sequences. (Running on oeis4.)