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A299846
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 8, 93, 1626, 46799, 2030211, 133388471, 13452150161, 2094291398899
OFFSET
1,2
COMMENTS
Diagonal of A299852.
EXAMPLE
Some solutions for n=5
..0..1..0..1..1. .0..0..0..1..0. .0..0..1..0..0. .0..0..0..0..0
..0..1..0..0..0. .0..1..1..0..1. .1..0..1..0..1. .0..1..1..1..1
..1..0..0..0..1. .0..1..1..1..1. .1..0..1..0..1. .1..1..0..0..0
..0..1..0..1..1. .0..0..0..1..0. .0..1..1..0..0. .1..0..1..1..1
..1..0..0..1..0. .1..1..1..1..0. .1..0..1..0..1. .0..1..0..0..1
CROSSREFS
Cf. A299852.
Sequence in context: A319176 A299034 A299339 * A214385 A121161 A360200
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2018
STATUS
approved