A155239 - OEIS

A155239

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

1, 7, 19, 37, 144, 940, 6913, 44442, 383165, 4775804, 73750670, 1270986469, 26693174009, 724206936085, 24621385504435

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

OFFSET

4,2

LINKS

EXAMPLE

Maximal 8 X 8 X 8 example

..........0

.........0.1

........1.1.0

.......0.0.1.0

......0.1.0.1.0

.....0.1.0.0.0.1

....1.1.0.1.1.1.0

...0.0.1.0.0.0.1.0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved