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A185556
1/3 the number of n X 6 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
1
11, 2768, 269496, 30132444, 3228500154, 353403366772, 38323943289566, 4170998760222200, 453352604882802786, 49299729427562107330, 5360092608575438753444, 582815441403601709584574
OFFSET
1,1
COMMENTS
Column 6 of A185559.
LINKS
EXAMPLE
Some solutions for 4 X 6 with a(1,1)=0
..0..0..1..0..0..2....0..0..2..2..1..1....0..0..0..2..1..1....0..0..0..0..2..2
..0..1..1..2..0..2....0..1..1..1..2..2....0..1..1..2..2..1....0..1..1..1..0..0
..0..0..2..2..0..1....0..0..0..1..2..2....0..0..1..1..2..1....0..0..2..0..2..2
..1..1..1..1..0..1....1..1..1..0..0..0....1..1..0..0..2..2....1..1..2..0..0..2
CROSSREFS
Cf. A185559.
Sequence in context: A239897 A138075 A222315 * A227785 A216347 A377762
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 31 2011
STATUS
approved