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A305510
Number of nXn 0..1 arrays with every element unequal to 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
0, 3, 5, 10, 62, 343, 3547, 61412, 923608, 35152678, 1244230912, 61874796253, 5719344291435
OFFSET
1,2
COMMENTS
Diagonal of A305516.
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .0..0..0..1..0. .0..0..1..0..0. .0..0..0..0..0
..0..1..0..0..0. .1..0..0..0..0. .1..0..0..0..1. .1..0..0..1..0
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..1..0..0..0..0. .0..1..0..0..1. .0..1..0..0..1. .0..0..0..0..1
..0..0..0..1..0. .0..0..0..0..0. .0..0..0..0..0. .0..1..0..0..0
CROSSREFS
Cf. A305516.
Sequence in context: A060955 A358899 A317338 * A024329 A354517 A354389
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 03 2018
STATUS
approved