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A282521 Number of nXn 0..1 arrays with no 1 equal to more than two of its king-move neighbors. 0
2, 15, 206, 10041, 1207312, 398640091, 361721564040, 875346670745937, 5767525160678662991, 102661002619385216856135, 4940138347214734739677499008, 643409155783450143737358154350996 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A282528.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A282528.

Sequence in context: A184361 A124558 A020565 * A099718 A143881 A298692

Adjacent sequences:  A282518 A282519 A282520 * A282522 A282523 A282524

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2017

STATUS

approved

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Last modified February 27 03:50 EST 2020. Contains 332299 sequences. (Running on oeis4.)