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A316212 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 28, 310, 8943, 273102, 17524746, 1966735514, 338897042438, 103107282046491 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A316218.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316218.

Sequence in context: A007152 A295258 A177554 * A192485 A332097 A198513

Adjacent sequences:  A316209 A316210 A316211 * A316213 A316214 A316215

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 26 2018

STATUS

approved

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Last modified June 1 20:49 EDT 2020. Contains 334765 sequences. (Running on oeis4.)