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A298721
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.
0
1, 5, 5, 34, 336, 4001, 76983, 2232433, 92349689, 5607760208
OFFSET
1,2
COMMENTS
Diagonal of A298727.
EXAMPLE
Some solutions for n=5
..0..1..0..1..1. .0..0..1..1..1. .0..0..0..0..0. .0..1..0..1..0
..0..0..0..0..1. .0..1..0..1..0. .0..0..0..0..0. .1..1..1..1..1
..0..1..1..1..0. .1..1..0..1..1. .0..0..0..0..0. .1..0..1..0..1
..1..0..0..0..1. .0..1..0..1..0. .1..1..1..1..1. .0..0..0..0..0
..1..1..0..1..1. .0..0..1..0..0. .1..1..1..1..1. .0..1..0..1..0
CROSSREFS
Cf. A298727.
Sequence in context: A270725 A317812 A298961 * A299555 A160608 A208950
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2018
STATUS
approved