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A316998
Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 8, 162, 7665, 854383, 223714229, 140997597309, 211618250694112, 754017146499756182
OFFSET
1,2
COMMENTS
Diagonal of A317004.
EXAMPLE
Some solutions for n=5
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1
..0..0..0..1..1. .0..1..1..1..1. .0..0..1..1..1. .0..0..0..1..1
..1..1..1..1..1. .1..1..1..1..1. .0..1..1..1..0. .1..1..1..1..1
..1..0..1..1..1. .1..1..1..0..1. .1..1..0..1..0. .1..0..1..0..1
..0..1..0..1..1. .0..1..1..0..0. .0..1..1..1..0. .0..1..0..0..1
CROSSREFS
Cf. A317004.
Sequence in context: A183813 A222274 A061711 * A075387 A143857 A025606
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 18 2018
STATUS
approved