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A316372
Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 13, 418, 16817, 1396959, 294007902, 118878261056, 97754857507717
OFFSET
1,2
COMMENTS
Diagonal of A316376.
EXAMPLE
Some solutions for n=5
..0..1..1..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..0..1
..1..0..1..0..1. .1..0..1..1..0. .1..1..0..0..1. .0..1..1..0..1
..1..0..1..0..1. .0..1..0..0..0. .0..0..0..0..0. .0..1..1..1..1
..1..0..1..0..1. .1..1..0..0..1. .1..1..0..1..0. .0..1..0..0..0
..1..0..1..0..1. .0..1..1..0..1. .0..0..1..0..1. .1..0..1..1..1
CROSSREFS
Cf. A316376.
Sequence in context: A048558 A219571 A304545 * A306130 A317267 A219366
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 30 2018
STATUS
approved