A155255 - OEIS

A155255

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

1, 7, 19, 37, 138, 709, 5288, 35178, 273388, 2852364, 38034180, 614782409, 11580813304, 263078868069, 7443277204441, 259134680265818

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

OFFSET

4,2

LINKS

EXAMPLE

Maximal 11 X 11 X 11 example

.............0

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

...........0.1.1

..........1.1.0.0

.........0.1.0.1.0

........0.0.0.1.1.0

.......0.0.0.0.0.1.1

......1.1.0.1.1.0.1.0

.....0.1.0.0.1.0.0.0.1

....0.1.0.0.1.0.1.1.1.1

...0.1.1.0.1.1.0.1.0.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved