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A205978 Number of (n+1)X(n+1) 0..2 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases 1
81, 1980, 27060, 419088, 9653376, 338009472, 19410499584, 1690931386368, 230418338273280, 52219993101631488, 18073632573916545024, 9818099537300641382400, 8885510832166696098201600 (list; graph; refs; listen; history; text; internal format)
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 A282861

Adjacent sequences:  A205975 A205976 A205977 * A205979 A205980 A205981

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 02 2012

STATUS

approved

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Last modified January 26 20:11 EST 2020. Contains 331288 sequences. (Running on oeis4.)