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A305587 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. 0
1, 8, 95, 2451, 126484, 13941521, 3190446497, 1517186100046, 1505396101042225 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A305593.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305593.

Sequence in context: A299747 A300261 A121785 * A229294 A241813 A116144

Adjacent sequences:  A305584 A305585 A305586 * A305588 A305589 A305590

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 05 2018

STATUS

approved

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Last modified May 17 19:51 EDT 2022. Contains 353778 sequences. (Running on oeis4.)