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A305679 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 0
1, 4, 25, 1595, 383910, 351440611, 1172824606532, 14227138873003015, 624906012671792336577 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A305685.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .0..1..0..0..0. .0..1..0..0..0. .0..1..0..1..0
..1..1..0..0..1. .0..1..1..1..1. .0..1..0..1..1. .1..0..0..1..0
..1..1..0..0..0. .0..0..0..0..1. .1..1..1..0..0. .0..1..0..0..1
..0..0..1..0..1. .0..1..1..0..0. .1..0..0..1..1. .1..1..0..1..0
..1..1..0..0..1. .1..0..0..1..1. .1..0..0..1..1. .0..1..0..1..0
CROSSREFS
Cf. A305685.
Sequence in context: A072882 A014253 A132553 * A317061 A144229 A316926
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 08 2018
STATUS
approved

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Last modified June 13 17:32 EDT 2024. Contains 373391 sequences. (Running on oeis4.)