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A316734
Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
0, 7, 23, 95, 4956, 144106, 1906293, 1342645923, 632741511767, 215792317298469
OFFSET
1,2
COMMENTS
Diagonal of A316740.
EXAMPLE
Some solutions for n=5
..0..1..1..1..0. .0..1..1..0..0. .0..0..1..0..1. .0..0..1..1..0
..0..0..1..1..1. .0..0..1..1..0. .0..1..0..1..0. .1..0..1..1..0
..1..1..1..0..1. .1..1..1..1..1. .0..0..0..0..0. .1..1..1..0..1
..1..0..1..1..0. .1..1..0..0..1. .0..1..0..0..0. .0..1..1..0..1
..0..1..1..1..0. .0..1..1..1..0. .0..1..1..0..1. .0..0..1..1..0
CROSSREFS
Cf. A316740.
Sequence in context: A003540 A063793 A217233 * A096327 A267805 A154113
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 11 2018
STATUS
approved