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A316212
Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 28, 310, 8943, 273102, 17524746, 1966735514, 338897042438, 103107282046491
OFFSET
1,2
COMMENTS
Diagonal of A316218.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..1..0. .0..1..0..0..0. .0..0..0..0..0
..1..0..1..0..0. .0..0..0..0..1. .0..0..1..0..1. .1..1..0..1..1
..0..0..0..0..0. .0..0..0..0..0. .0..1..1..1..0. .1..1..1..1..1
..0..0..0..0..0. .0..1..0..0..1. .0..1..1..1..1. .1..1..1..1..0
..0..0..0..1..1. .0..0..0..0..1. .1..1..1..1..1. .1..0..1..1..0
CROSSREFS
Cf. A316218.
Sequence in context: A345248 A295258 A177554 * A337592 A192485 A332097
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 26 2018
STATUS
approved