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A298953
Number of n X n 0..1 arrays with every element equal to 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
0
0, 1, 1, 4, 10, 102, 3101, 300849, 54865647, 36049757678
OFFSET
1,4
COMMENTS
Diagonal of A298957.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0
..0..0..0..0..0. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0
..0..0..0..0..0. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0
..1..1..1..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0
..1..1..1..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0
CROSSREFS
Cf. A298957.
Sequence in context: A153743 A370987 A245304 * A197851 A197865 A267128
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2018
STATUS
approved