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A296945
Number of n X n 0..1 arrays with each 1 adjacent to 1, 3 or 5 king-move neighboring 1's.
0
1, 8, 45, 620, 37179, 2640993, 482228052, 246430289779, 233010334725043, 513658708035556281
OFFSET
1,2
COMMENTS
Diagonal of A296952.
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .1..0..1..1..0. .0..1..0..0..0. .0..0..0..1..1
..0..0..0..0..0. .1..0..0..0..0. .0..0..1..0..0. .0..0..0..1..1
..0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0. .1..1..0..1..1
..0..0..0..0..1. .1..1..0..0..1. .0..0..1..0..0. .1..1..0..0..0
..1..1..0..1..0. .0..0..0..0..0. .0..0..1..0..0. .0..0..0..1..1
CROSSREFS
Cf. A296952.
Sequence in context: A306047 A110348 A336999 * A328198 A340975 A213132
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 22 2017
STATUS
approved