A206672 Number of (n+1) X 5 0..2 arrays with no 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors or the same number of counterclockwise edge increases as its vertical neighbors.

7572, 47106, 319698, 2046168, 14200242, 97476666, 700650756, 5009030472, 36741349836, 268711237302, 1994098917228, 14775953774574, 110406362734710, 824271504884262, 6183800255704620, 46369341402893430, 348694541730025260

Offset

1,1

Comments

Column 4 of A206676.

Links

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

Example

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

Crossrefs

Sequence in context: A031585 A031765 A205740 * A205516 A260036 A064872

Adjacent sequences: A206669 A206670 A206671 * A206673 A206674 A206675

Keyword

nonn

Author

R. H. Hardin, Feb 11 2012

Status

approved