A205978 Number of (n+1)X(n+1) 0..2 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases

81, 1980, 27060, 419088, 9653376, 338009472, 19410499584, 1690931386368, 230418338273280, 52219993101631488, 18073632573916545024, 9818099537300641382400, 8885510832166696098201600

Offset

1,1

Comments

Diagonal of A205986

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A238038 A236088 A253448 * A037211 A238237 A350870

Adjacent sequences: A205975 A205976 A205977 * A205979 A205980 A205981

Keyword

nonn

Author

R. H. Hardin Feb 02 2012

Status

approved