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A283035 Number of nXn 0..1 arrays with no 1 equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element. 0
0, 4, 119, 9152, 1604067, 706205768, 797350288363, 2355217281173760, 18388049679475271526, 382245292023510825419744 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A283042.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A283042.

Sequence in context: A096464 A285053 A264420 * A284764 A271421 A064204

Adjacent sequences:  A283032 A283033 A283034 * A283036 A283037 A283038

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 27 2017

STATUS

approved

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Last modified November 19 03:48 EST 2019. Contains 329310 sequences. (Running on oeis4.)