login
A155414
Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,0 3,1 4,0 5,1 6,1 polyhexes in any orientation on a planar n X n X n triangular grid.
0
1, 7, 19, 52, 254, 1049, 4097, 19919, 121609, 822616, 6525958, 61351204
OFFSET
6,2
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........1.0
..........0.1.0
.........1.1.0.1
........1.0.0.0.1
.......0.1.0.0.1.0
......0.1.0.0.0.1.1
.....0.0.0.0.0.0.0.1
....0.1.1.0.1.1.0.1.0
...1.1.0.1.1.0.0.0.1.0
CROSSREFS
Sequence in context: A155309 A155419 A155246 * A155374 A155272 A092053
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2009
STATUS
approved