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A306167
Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
0
1, 5, 13, 93, 832, 5277, 53834, 722779, 11592019, 300465411, 11442115258
OFFSET
1,2
COMMENTS
Diagonal of A306172.
EXAMPLE
Some solutions for n=5
..0..0..0..0..1. .0..1..0..0..1. .0..0..0..0..0. .0..1..0..0..1
..0..0..0..1..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..1..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..0..1. .1..0..0..0..0. .0..0..0..0..0. .0..0..0..1..0
..0..0..0..1..1. .0..0..0..1..0. .1..0..0..1..0. .0..1..0..1..1
CROSSREFS
Cf. A306172.
Sequence in context: A055623 A280294 A304663 * A107171 A309532 A123646
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 23 2018
STATUS
approved