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A206002 Number of (n+1) X (n+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to one, and every 2 X 2 determinant nonzero. 0
24, 300, 2728, 64224, 566288, 32546974, 262845336, 51670233144, 345767017112, 315611607627526, 1611191289726456, 8005845542601521472 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A206010.
LINKS
EXAMPLE
Some solutions for n=4
..1..1..1..1..1....2..1..0..2..0....2..1..0..2..2....2..1..0..2..1
..0..1..0..1..2....1..1..2..2..2....0..1..1..1..2....2..2..2..2..0
..1..1..1..1..1....2..1..1..2..1....1..1..2..1..1....1..2..0..2..2
..2..1..0..1..2....2..2..1..1..1....1..2..2..2..0....2..2..2..2..0
..0..1..1..1..1....0..2..2..1..0....2..2..0..2..2....1..2..0..2..2
CROSSREFS
Cf. A206010.
Sequence in context: A100130 A014103 A321953 * A000552 A233876 A171742
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2012
STATUS
approved

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Last modified May 23 10:34 EDT 2024. Contains 372760 sequences. (Running on oeis4.)