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A155426 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,0 4,1 4,2 5,0 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 10, 22, 55, 188, 612, 2433, 12227, 68641, 419235, 2949869, 24062426, 221080988, 2326692356 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,2

LINKS

Table of n, a(n) for n=5..19.

EXAMPLE

Maximal 10 X 10 X 10 example

............1

...........1.0

..........0.1.0

.........0.0.1.0

........1.1.1.0.1

.......1.0.0.0.0.1

......0.0.0.0.0.1.0

.....0.1.1.0.0.1.0.0

....0.1.0.1.0.0.1.1.1

...1.1.0.0.1.1.0.0.0.1

CROSSREFS

Sequence in context: A155407 A318416 A124697 * A155421 A155343 A155341

Adjacent sequences:  A155423 A155424 A155425 * A155427 A155428 A155429

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified August 10 22:36 EDT 2022. Contains 356046 sequences. (Running on oeis4.)