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A155261
Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,1 3,0 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 7, 25, 55, 353, 2143, 18201, 203783, 2290841, 37082423, 818768313, 20744782567, 698778878809, 29337409298279
OFFSET
3,2
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........1.1
..........0.1.0
.........1.1.0.0
........0.0.0.0.0
.......0.1.1.0.1.0
......1.0.1.1.1.0.1
.....0.1.0.0.0.0.1.0
....1.1.0.1.1.1.0.1.1
...1.1.0.1.0.1.1.0.1.1
CROSSREFS
Sequence in context: A155256 A155230 A155231 * A365444 A268239 A350222
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved