A185556 - OEIS

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.

11, 2768, 269496, 30132444, 3228500154, 353403366772, 38323943289566, 4170998760222200, 453352604882802786, 49299729427562107330, 5360092608575438753444, 582815441403601709584574

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 6 of A185559.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

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 A214137

Adjacent sequences: A185553 A185554 A185555 * A185557 A185558 A185559

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 31 2011

STATUS

approved