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A205940 Number of (n+1) X 5 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. 1
91440, 620988, 6705048, 70027468, 692354440, 6909160028, 72541287824, 778680028616, 7889326861776, 81346754344248, 853506521827200, 9001326523610412, 92292464888517816, 960070329464841064 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A205944.
LINKS
EXAMPLE
Some solutions for n=4:
..3..2..1..1..1....3..1..0..0..2....3..0..0..3..2....0..0..1..2..0
..0..3..3..3..2....3..0..0..0..2....3..0..0..0..3....3..3..0..3..1
..0..1..1..0..3....3..0..0..1..3....0..1..0..0..0....3..3..3..0..1
..0..0..2..1..2....0..1..1..3..3....3..2..1..0..0....0..3..3..3..2
..2..1..0..1..1....0..1..1..1..0....1..3..0..1..0....2..1..1..0..3
CROSSREFS
Sequence in context: A253838 A253845 A253932 * A204881 A330159 A202590
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 01 2012
STATUS
approved

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Last modified May 30 17:43 EDT 2024. Contains 372971 sequences. (Running on oeis4.)