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A316512
Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 8, 28, 204, 2995, 73031, 3646656, 442204876, 110715247064, 59638747389710, 71177795600554924, 181350693611354151984, 1002521061243272588552787
OFFSET
1,2
COMMENTS
Diagonal of A316518.
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..0..0..0..0. .0..0..0..0..1. .0..1..1..0..0
..0..1..0..0..1. .0..0..0..1..0. .0..1..0..0..0. .1..1..0..1..1
..1..0..0..0..0. .0..0..0..0..0. .0..1..0..1..0. .1..1..1..1..1
..1..0..0..0..0. .0..1..1..0..0. .0..0..0..0..0. .1..1..0..1..1
..1..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1. .0..1..1..0..0
CROSSREFS
Cf. A316518.
Sequence in context: A226744 A058289 A152014 * A200034 A230702 A374280
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 05 2018
STATUS
approved