A203844 Number of nX6 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

1, 810, 362648, 83049596, 19914461784, 5191761888989, 1343321735549790, 345412651608406381, 89264849660965978156, 23113820838413136068578, 5981531421021641392319948, 1547617761143017432765908639

Offset

1,2

Comments

Column 6 of A203846

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A346716 A156404 A282376 * A068278 A208189 A183216

Adjacent sequences: A203841 A203842 A203843 * A203845 A203846 A203847

Keyword

nonn

Author

R. H. Hardin Jan 06 2012

Status

approved