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A205942 Number of (n+1) X 7 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
4711264, 34647764, 519841120, 6909160028, 103395482496, 1498787263308, 22850275822056, 350243656458156, 5398960736044656, 84190508155837176, 1298216839771776032, 20181211947687559772, 312919261125294119584 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A205944.
LINKS
EXAMPLE
Some solutions for n=4:
..1..2..2..1..0..1..2....0..2..0..3..3..2..0....2..0..0..2..0..3..0
..3..2..2..2..1..1..3....0..2..1..0..2..2..1....2..2..1..3..3..3..1
..0..3..2..2..1..1..0....0..3..2..0..0..3..2....1..3..2..2..3..3..2
..0..0..3..3..2..2..1....1..0..2..2..1..0..2....0..1..2..3..0..0..3
..0..0..3..3..2..2..0....2..0..0..3..2..0..0....0..0..3..0..0..0..2
CROSSREFS
Cf. A205944.
Sequence in context: A083605 A210333 A069340 * A271142 A258132 A083641
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 01 2012
STATUS
approved

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Last modified May 20 19:00 EDT 2024. Contains 372720 sequences. (Running on oeis4.)