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A282521
Number of n X n 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
OFFSET
1,1
COMMENTS
Diagonal of A282528.
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: A124558 A020565 A377861 * A099718 A143881 A377890
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 17 2017
STATUS
approved