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A316759
Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
0, 3, 4, 410, 26845, 2605126, 1169271436, 947123604065, 1765677169210138
OFFSET
1,2
COMMENTS
Diagonal of A316763.
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .0..1..0..1..0. .0..1..0..0..0. .0..1..0..1..0
..0..1..0..1..1. .1..0..0..1..0. .0..1..1..1..1. .0..1..1..0..1
..1..1..1..1..1. .0..1..0..0..1. .1..1..1..0..1. .1..0..1..1..1
..0..0..1..0..0. .0..0..0..0..0. .1..0..1..1..0. .1..1..0..1..0
..1..0..1..0..1. .1..1..1..0..1. .0..1..0..0..1. .0..1..1..0..1
CROSSREFS
Cf. A316763.
Sequence in context: A305505 A069970 A305169 * A334471 A153063 A165499
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 12 2018
STATUS
approved