A265453 Number of nX3 0..n+3-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

12, 250, 7422, 216466, 6056182, 161435322, 4148236142, 103476193518, 2523840866186, 60444664118334, 1426665304637082, 33267668122964462, 768000220549574982, 17579038730691587714, 399459371232734669014

Offset

1,1

Comments

Column 3 of A265458.

Links

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

Example

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

Crossrefs

Cf. A265458.

Sequence in context: A245919 A245913 A245917 * A367737 A210484 A099139

Adjacent sequences: A265450 A265451 A265452 * A265454 A265455 A265456

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved