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A317119
Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 8, 82, 1597, 65099, 5694906, 1062867065, 424977120539, 367017165957020
OFFSET
1,2
COMMENTS
Diagonal of A317125.
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..0..0..0..0. .0..0..1..0..1. .0..1..1..1..1
..0..1..1..1..0. .0..0..1..1..0. .0..1..1..1..1. .1..1..1..0..1
..1..0..0..1..0. .0..0..0..0..0. .1..1..1..0..1. .1..1..0..1..1
..1..1..0..0..1. .0..0..0..1..0. .0..1..1..1..1. .1..1..1..1..0
..0..1..0..0..1. .0..0..1..1..1. .1..1..1..1..0. .0..1..0..1..1
CROSSREFS
Cf. A317125.
Sequence in context: A358600 A163191 A241708 * A285455 A068173 A069635
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 21 2018
STATUS
approved