A199128 Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor

1, 2, 6, 19, 70, 264, 1038, 4155, 16896, 69584, 289146, 1211873, 5111178, 21686612, 92453594, 395888507, 1701506820, 7337867736, 31739124866, 137656095241, 598476364166, 2607710997676, 11385288787534, 49800060551081

Offset

1,2

Comments

Column 3 of A199133

Links

R. H. Hardin, Table of n, a(n) for n = 1..130

Example

Some solutions for n=5
..0..1..0....0..1..2....0..1..0....0..1..2....0..1..0....0..1..2....0..1..0
..1..0..2....2..0..1....1..0..2....1..0..1....1..0..2....1..2..0....2..0..2
..0..2..1....0..1..2....0..2..1....0..2..0....2..1..0....2..0..1....0..1..0
..2..0..2....1..2..0....2..1..2....2..1..2....1..2..1....1..2..0....1..2..1
..1..2..1....2..0..1....0..2..1....0..2..1....2..0..2....0..1..2....2..1..2

Crossrefs

Sequence in context: A150112 A150113 A150114 * A150115 A177477 A150116

Adjacent sequences: A199125 A199126 A199127 * A199129 A199130 A199131

Keyword

nonn

Author

R. H. Hardin Nov 03 2011

Status

approved