A206412 Number of (n+1) X 7 0..2 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.

600519, 181467207, 56515649709, 17769571483479, 5607670598448153, 1772313933215113017, 560493388205613135219, 177302245070698531560585, 56092636774114046549483283, 17746700710940391048253081503

Offset

1,1

Comments

Column 6 of A206414.

Links

R. H. Hardin, Table of n, a(n) for n = 1..44

Example

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

Crossrefs

Sequence in context: A106779 A106780 A304000 * A235257 A185928 A270262

Adjacent sequences: A206409 A206410 A206411 * A206413 A206414 A206415

Keyword

nonn

Author

R. H. Hardin, Feb 07 2012

Status

approved