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A316572 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 11, 246, 3180, 129257, 8469438, 730909482, 185758559665, 50251974557654 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A316576.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316576.

Sequence in context: A118197 A092658 A304888 * A216571 A299046 A113314

Adjacent sequences:  A316569 A316570 A316571 * A316573 A316574 A316575

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 07 2018

STATUS

approved

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Last modified October 19 11:26 EDT 2019. Contains 328216 sequences. (Running on oeis4.)