A209910 Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences

399930, 152153160, 53888573444, 19391662870652, 6954596004028468, 2497054784947973388, 896278100477366851795, 321743305461455008300382, 115494087693753318505527463, 41458747023669964452852387044

Offset

1,1

Comments

Column 5 of A209913

Links

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

Example

Some solutions for n=4
..3..1..3..1..0..0....2..2..3..1..1..2....1..0..0..1..0..3....1..2..1..3..2..1
..3..0..1..2..1..3....3..0..3..0..3..1....2..1..3..0..1..3....3..1..3..1..0..2
..1..1..3..1..3..2....0..1..1..1..1..2....1..3..0..1..0..1....1..0..3..0..3..3
..0..3..0..0..1..0....2..3..0..3..0..3....3..2..3..1..3..2....3..2..2..3..1..0
..1..2..2..3..3..2....0..0..3..0..3..2....2..1..2..3..2..0....0..0..3..0..3..0

Crossrefs

Sequence in context: A209784 A015424 A083634 * A190837 A205094 A234419

Adjacent sequences: A209907 A209908 A209909 * A209911 A209912 A209913

Keyword

nonn

Author

R. H. Hardin Mar 15 2012

Status

approved