A206135 Number of (n+1) X 7 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases.

797996, 241927532, 75353928196, 23692759265020, 7476894104333060, 2363085244017636372, 747324517604795047052, 236402993427571147646868, 74790182365485126434100812, 23662267614587185373925151692

Offset

1,1

Comments

Column 6 of A206137.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4:
..2..0..2..1..2..3..0....0..1..2..0..1..2..1....1..0..1..2..3..2..0
..0..1..0..3..0..1..2....1..2..3..1..0..1..0....2..1..0..1..2..3..1
..3..0..3..2..3..0..1....0..1..2..3..2..3..1....1..0..2..3..0..2..3
..1..2..0..3..2..3..0....3..0..1..2..3..0..3....2..1..3..0..1..0..1
..0..1..2..1..0..1..3....2..3..0..1..2..3..2....3..2..0..3..0..3..0

Crossrefs

Sequence in context: A151561 A022203 A234784 * A237543 A053086 A106781

Adjacent sequences: A206132 A206133 A206134 * A206136 A206137 A206138

Keyword

nonn

Author

R. H. Hardin, Feb 04 2012

Status

approved