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A203844 Number of nX6 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 810, 362648, 83049596, 19914461784, 5191761888989, 1343321735549790, 345412651608406381, 89264849660965978156, 23113820838413136068578, 5981531421021641392319948, 1547617761143017432765908639 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 22 13:15 EDT 2021. Contains 348170 sequences. (Running on oeis4.)