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A316507
Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
0, 3, 16, 1321, 317264, 295326468, 990266635029, 12088043573966128, 535440346291887704215
OFFSET
1,2
COMMENTS
Diagonal of A316511.
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..0..0..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..1..0..1. .1..1..1..0..1. .0..1..1..1..1. .0..1..1..0..1
..1..0..1..1..0. .0..0..1..0..0. .0..0..0..0..0. .1..0..1..1..0
..0..1..0..0..1. .1..1..0..1..1. .1..0..0..1..1. .1..1..0..0..0
..1..0..1..1..0. .0..1..1..0..0. .0..1..1..1..0. .0..1..1..1..1
CROSSREFS
Cf. A316511.
Sequence in context: A002794 A132559 A304761 * A317459 A080273 A096404
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 05 2018
STATUS
approved