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A297979 Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero. 0
1, 5, 2, 15, 34, 131, 444, 1980, 6500, 36299, 183806, 1060708, 6012246, 38646743, 263315276, 2019852311 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A297986.
LINKS
EXAMPLE
Some solutions for n=7
..0..0..0..1..0..1..1. .0..1..0..0..0..1..0. .0..0..0..0..1..1..0
..0..1..1..0..1..0..1. .1..1..1..0..1..1..1. .0..1..1..0..1..0..0
..1..0..1..0..1..0..0. .0..0..0..0..0..0..0. .1..0..1..0..1..0..1
..1..0..1..0..1..0..1. .0..1..1..1..1..1..0. .1..0..1..0..1..1..1
..1..0..1..0..1..1..1. .1..0..0..0..0..0..1. .1..0..1..0..1..0..1
..1..0..1..0..1..0..1. .0..1..1..1..1..1..0. .1..0..1..0..1..0..0
..1..1..0..1..0..0..0. .0..0..0..0..0..0..0. .1..1..0..1..1..0..1
CROSSREFS
Cf. A297986.
Sequence in context: A213550 A283242 A246209 * A298630 A248258 A279150
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 10 2018
STATUS
approved

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)