A210268 Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences

35, 5558, 6028871, 44678808183, 2261599192647037, 781910030615896210474, 1846356382998737252290206762, 29777644269614247388351983235258241, 3280051134759806457403130482690269897360711

Offset

1,1

Comments

Diagonal of A210276

Links

R. H. Hardin, Table of n, a(n) for n = 1..11

Example

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

Crossrefs

Sequence in context: A202067 A336306 A202881 * A025036 A224126 A249888

Adjacent sequences: A210265 A210266 A210267 * A210269 A210270 A210271

Keyword

nonn

Author

R. H. Hardin Mar 19 2012

Status

approved