A206142 Number of (n+1) X (n+1) 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases.

81, 246, 7812, 580986, 101596896, 41869995708, 40724629633188, 93574975249028022, 508279521493590763140, 6529777647254616589112172, 198475392061658571459051861720, 14277440032279343277552357109481028

Offset

1,1

Comments

Diagonal of A206150.

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

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

Crossrefs

Sequence in context: A044986 A237160 A236886 * A225027 A225020 A219131

Adjacent sequences: A206139 A206140 A206141 * A206143 A206144 A206145

Keyword

nonn

Author

R. H. Hardin, Feb 04 2012

Status

approved