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A155225
Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid.
0
1, 3, 7, 13, 38, 180, 805, 3814, 25700, 220335, 2064779, 23174247, 331474649, 5713874467, 116010028877, 2863484145009, 86429492811884, 3140385298427338, 137283404960168681, 7274093873738312075
OFFSET
3,2
EXAMPLE
Maximal 10 X 10 X 10 example
............0
...........1.0
..........0.1.1
.........0.1.0.0
........1.0.0.1.0
.......0.1.1.0.1.1
......0.1.0.0.1.0.0
.....1.0.0.1.0.0.1.0
....0.1.1.0.1.1.0.1.1
...0.1.0.0.1.0.0.1.0.0
CROSSREFS
Sequence in context: A147448 A146449 A145956 * A051842 A147447 A062605
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved