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A298568 Number of n X n 0..1 arrays with every element equal to 0, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 0
1, 4, 1, 3, 480, 174, 2888, 582062, 939451, 50950770, 21558889086 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A298575.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..1..1. .0..1..1..1..1. .0..1..0..0..1. .0..1..1..1..0
..1..0..1..0..1. .1..1..1..1..0. .1..1..0..1..1. .0..0..1..1..1
..1..1..1..1..1. .1..1..1..0..0. .0..0..0..0..0. .1..1..1..1..1
..1..1..1..0..0. .0..1..1..1..1. .0..1..1..0..1. .0..1..1..1..0
..1..0..1..0..1. .1..1..1..1..0. .0..0..1..0..0. .1..1..1..0..0
CROSSREFS
Cf. A298575.
Sequence in context: A085471 A064221 A229672 * A152890 A143354 A324026
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2018
STATUS
approved

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Last modified June 3 04:09 EDT 2023. Contains 363103 sequences. (Running on oeis4.)