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A305334
Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 12, 81, 1185, 30826, 1321695, 98008416, 12373093291, 2656799749952, 971390294075369, 604435523445204922, 640013417117018100841, 1153330960736161428690488
OFFSET
1,2
COMMENTS
Diagonal of A305340.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..1..0..0. .0..0..1..0..0. .0..1..0..0..0
..0..0..0..1..0. .0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..1
..1..0..0..0..0. .1..0..0..1..0. .1..0..0..0..0. .0..0..0..0..0
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .0..1..1..0..0
..0..0..1..0..0. .0..0..0..1..0. .0..0..0..0..0. .0..1..1..0..0
CROSSREFS
Cf. A305340.
Sequence in context: A010370 A197852 A362384 * A205337 A359047 A263866
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 30 2018
STATUS
approved