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A296681 Number of n X n 0..1 arrays with each 1 adjacent to 1, 2 or 3 king-move neighboring 1's. 0
1, 12, 210, 11478, 2323514, 1231267842, 2094245366560, 11122215538558651, 176228516137528739528, 8634201557142385630070796 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A296688.
LINKS
EXAMPLE
Some solutions for n=4
..1..1..0..1. .1..1..1..1. .0..1..1..0. .1..0..1..1. .1..1..0..1
..0..1..0..1. .0..0..0..1. .0..0..0..0. .1..0..0..1. .1..1..0..1
..0..1..0..0. .1..0..0..1. .0..0..0..1. .1..0..0..1. .0..0..0..1
..1..0..1..1. .1..0..0..0. .0..0..1..1. .1..0..1..1. .0..0..0..1
CROSSREFS
Cf. A296688.
Sequence in context: A334886 A027399 A266910 * A231260 A317199 A281253
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2017
STATUS
approved

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Last modified June 21 11:05 EDT 2024. Contains 373544 sequences. (Running on oeis4.)