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A305282 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero. 0
0, 7, 55, 1763, 41446, 2636906, 214220078, 29751215558, 7368593302345, 2763205267731126 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A305288.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305288.

Sequence in context: A239156 A117993 A055056 * A197228 A009521 A116120

Adjacent sequences:  A305279 A305280 A305281 * A305283 A305284 A305285

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 29 2018

STATUS

approved

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)