A155307 - OEIS

A155307

Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,0 3,1 4,0 polyhexes in any orientation on a planar nXnXn triangular grid.

1, 4, 13, 37, 146, 620, 2737, 17298, 136979, 1185666, 12752003, 161758550, 2364549128, 42702118766

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

OFFSET

4,2

COMMENTS

Same series for 0,0 1,0 2,0 2,1 3,0 3,1 4,0 polyhexes.

LINKS

EXAMPLE

Maximal 11 X 11 X 11 example

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

............0.1

...........0.1.0

..........1.0.1.1

.........1.0.0.0.1

........0.1.0.0.0.0

.......1.1.0.0.1.1.0

......1.0.0.1.1.0.1.1

.....0.0.0.0.0.0.0.0.0

....1.1.0.1.1.0.0.1.1.0

...0.0.1.1.0.0.1.1.0.1.1

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved