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A317260
Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 5, 10, 74, 718, 7477, 219131, 13595141, 1430955986, 323294486785
OFFSET
1,2
COMMENTS
Diagonal of A317266.
EXAMPLE
Some solutions for n=5
..0..1..1..0..1. .0..0..0..0..0. .0..1..0..1..1. .0..1..1..1..1
..0..0..1..0..0. .0..0..0..0..0. .1..1..0..0..1. .0..0..1..1..1
..0..0..1..1..1. .0..0..1..0..0. .1..1..0..0..0. .0..0..1..0..1
..1..0..0..0..1. .0..0..0..0..0. .1..1..0..0..0. .0..0..1..1..1
..1..1..0..0..0. .0..0..0..0..0. .1..0..1..0..0. .0..1..1..1..1
CROSSREFS
Cf. A317266.
Sequence in context: A356820 A358491 A316305 * A111992 A325583 A344194
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 25 2018
STATUS
approved