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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.
1
81, 246, 7812, 580986, 101596896, 41869995708, 40724629633188, 93574975249028022, 508279521493590763140, 6529777647254616589112172, 198475392061658571459051861720, 14277440032279343277552357109481028
OFFSET
1,1
COMMENTS
Diagonal of A206150.
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 04 2012
STATUS
approved