A199251 Number of nX3 0..3 arrays with values 0..3 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, 14, 114, 447, 16898, 311216, 2913528, 11312517, 551973865, 11307744507, 111458340272, 438326135133, 23492069994614, 506092203408916, 5117349646825383, 20296888647373122, 1141664017876511539

Offset

1,2

Comments

Column 3 of A199256

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Sequence in context: A293874 A044346 A044727 * A199196 A071573 A076429

Adjacent sequences: A199248 A199249 A199250 * A199252 A199253 A199254

Keyword

nonn

Author

R. H. Hardin Nov 04 2011

Status

approved