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A317030
Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 30, 354, 11368, 559097, 64983838, 19235095363, 14834277620731
OFFSET
1,2
COMMENTS
Diagonal of A317036.
EXAMPLE
Some solutions for n=5
..0..1..1..1..0. .0..1..0..1..0. .0..1..0..0..0. .0..1..1..0..1
..0..1..1..0..1. .0..0..0..0..1. .1..0..0..0..0. .0..1..1..1..1
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..1..1..1
..0..1..1..1..0. .0..1..0..0..0. .0..0..0..0..0. .1..0..0..0..1
..0..1..1..0..1. .0..0..0..1..0. .0..1..1..0..0. .0..0..0..0..1
CROSSREFS
Cf. A317036.
Sequence in context: A132622 A218296 A118792 * A192549 A303001 A370928
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 19 2018
STATUS
approved