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A205936 Number of (n+1) X (n+1) 0..3 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors. 0
256, 11028, 754704, 70027468, 8605131924, 1498787263308, 451135236949228 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A205944.
LINKS
EXAMPLE
Some solutions for n=4:
..0..0..3..1..1....3..3..1..3..3....0..1..0..3..3....0..1..2..3..2
..0..2..0..0..0....0..0..2..2..2....1..3..3..3..3....0..0..2..0..3
..1..3..0..2..1....0..0..1..2..2....1..2..3..3..0....0..0..3..2..2
..2..3..0..3..2....3..3..2..3..3....1..1..2..2..1....0..2..0..2..0
..3..3..1..0..2....2..0..3..3..3....1..1..1..3..2....1..3..0..2..1
CROSSREFS
Sequence in context: A224393 A224026 A237966 * A264496 A224967 A205652
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 01 2012
STATUS
approved

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Last modified February 25 00:32 EST 2024. Contains 370308 sequences. (Running on oeis4.)