A210273 Half the number of (n+1)X6 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences

129684, 47036870, 17097482699, 6218088462292, 2261599192647037, 822588621201609131, 299192733780770135628, 108822749899700419187880, 39581149154521036273501515, 14396506354147981090231615659

Offset

1,1

Comments

Column 5 of A210276

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A232420 A114668 A128038 * A250961 A225026 A202935

Adjacent sequences: A210270 A210271 A210272 * A210274 A210275 A210276

Keyword

nonn

Author

R. H. Hardin Mar 19 2012

Status

approved