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A297095
Number of n X n 0..1 arrays with no 1 adjacent to 4 king-move neighboring 1's.
0
2, 16, 351, 26278, 6316836, 4769336288, 11598374165583, 90071290640636405, 2231818836473290517838
OFFSET
1,1
COMMENTS
Diagonal of A297102.
EXAMPLE
Some solutions for n=4
..0..1..1..0. .1..1..0..0. .1..1..0..1. .1..1..0..1. .0..1..0..0
..1..0..0..0. .0..0..1..0. .0..0..0..1. .0..0..0..1. .0..1..0..1
..0..0..1..0. .0..0..1..1. .0..0..1..0. .1..0..1..0. .0..1..0..1
..1..0..1..0. .0..0..1..0. .1..0..0..0. .1..0..0..0. .0..1..0..0
CROSSREFS
Cf. A297102.
Sequence in context: A299907 A012610 A012721 * A289972 A179472 A009341
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 25 2017
STATUS
approved