A199584 Number of n X 2 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 every element equal to at least one horizontal or vertical neighbor.

0, 0, 0, 5, 35, 11, 495, 2645, 40637, 30867, 1260454, 2631033, 66043942, 64295478, 2600316008, 3797601337, 124025248853, 133588278925, 5375377028818, 6829626340182, 252066556346402, 284362587554599, 11455309274558540

Offset

1,4

Comments

Column 2 of A199588.

Links

R. H. Hardin, Table of n, a(n) for n = 1..40

Example

Some solutions for n=5
..0..1....0..0....0..0....0..1....0..0....0..0....0..0....0..0....0..1....0..0
..0..1....1..2....1..1....0..1....1..0....1..0....1..0....1..1....0..1....1..0
..2..1....1..2....1..2....2..1....1..1....1..2....1..2....2..1....0..2....1..2
..2..2....1..3....2..2....2..3....2..2....3..2....3..2....2..3....2..2....1..2
..3..3....3..3....3..3....3..3....3..3....3..3....3..2....3..3....3..3....3..3

Crossrefs

Cf. A199588.

Sequence in context: A174130 A095865 A199359 * A087675 A128044 A299529

Adjacent sequences: A199581 A199582 A199583 * A199585 A199586 A199587

Keyword

nonn

Author

R. H. Hardin, Nov 08 2011

Status

approved