login
A155368
Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,1 3,0 3,1 3,2 3,3 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 4, 10, 19, 34, 55, 406, 2950, 17731, 91675, 408976, 3333241, 44182549, 642260617, 9294897961, 125470980640, 2040625065922, 47345357523907, 1393444080049042
OFFSET
3,2
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........1.0
..........1.1.1
.........1.0.1.1
........0.0.0.0.0
.......0.1.1.0.1.0
......1.0.1.1.1.0.1
.....0.1.0.0.1.0.1.1
....1.1.1.0.1.0.0.1.0
...1.1.0.1.0.0.1.1.1.1
CROSSREFS
Sequence in context: A301194 A015616 A022905 * A301155 A301215 A155389
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved