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A284764
Number of n X n 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.
0
0, 4, 119, 10120, 4219759, 7032604532, 48994677634459, 1392340919671593156
OFFSET
1,2
COMMENTS
Diagonal of A284771.
EXAMPLE
Some solutions for n=4
..1..0..0..0. .0..0..1..1. .1..0..1..0. .1..0..1..0. .0..0..0..1
..1..1..1..0. .1..0..1..1. .1..0..1..1. .1..1..0..0. .0..0..0..0
..0..0..0..0. .1..0..0..1. .1..0..0..0. .0..1..0..0. .0..0..0..1
..0..1..1..1. .0..0..1..1. .0..1..0..0. .0..0..1..0. .0..0..1..1
CROSSREFS
Cf. A284771.
Sequence in context: A285053 A264420 A283035 * A271421 A064204 A054644
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 02 2017
STATUS
approved