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A298583
Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
0
1, 1, 9, 4, 65, 1112, 26343, 3833927, 1239155011, 967049306590
OFFSET
1,3
COMMENTS
Diagonal of A298589.
EXAMPLE
Some solutions for n=5
..0..1..1..1..1. .0..0..1..1..0. .0..0..1..1..1. .0..0..0..0..1
..1..1..0..1..1. .0..0..1..1..1. .0..0..1..1..1. .0..0..1..0..0
..1..0..0..0..1. .1..0..1..1..1. .1..1..0..0..0. .0..1..1..1..0
..1..1..0..1..1. .0..0..0..0..0. .1..1..0..0..0. .0..0..1..0..0
..0..1..1..1..0. .0..0..1..0..0. .1..1..0..0..1. .0..0..0..0..1
CROSSREFS
Cf. A298589.
Sequence in context: A122846 A248309 A317900 * A038294 A214102 A321575
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2018
STATUS
approved