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.

4711264, 34647764, 519841120, 6909160028, 103395482496, 1498787263308, 22850275822056, 350243656458156, 5398960736044656, 84190508155837176, 1298216839771776032, 20181211947687559772, 312919261125294119584

Offset

1,1

Comments

Column 6 of A205944.

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

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

Adjacent sequences: A205939 A205940 A205941 * A205943 A205944 A205945

Keyword

nonn

Author

R. H. Hardin, Feb 01 2012

Status

approved