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A317699
Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 25, 1719, 468002, 508895558, 2157266427366, 35375750998532860, 2234441612008121460906, 543166694783264652942675685
OFFSET
1,2
COMMENTS
Diagonal of A317703.
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..0..0..1..0. .0..0..0..0..1. .0..1..0..1..0
..1..1..0..0..0. .1..1..0..1..0. .1..1..0..1..0. .0..1..0..1..0
..0..0..1..0..1. .0..0..0..1..1. .1..0..0..1..1. .0..0..1..1..0
..1..0..1..1..0. .0..0..1..0..0. .1..0..0..0..1. .1..1..1..0..0
..1..0..0..1..0. .0..0..1..0..1. .1..0..1..0..1. .0..1..0..1..1
CROSSREFS
Cf. A317703.
Sequence in context: A317061 A144229 A316926 * A284106 A063802 A276266
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 04 2018
STATUS
approved