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A155360 Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 3,0 3,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 10, 22, 40, 135, 924, 5789, 30931, 175032, 1467331, 18452914, 249998893, 3424732727, 53967206180, 1112604199677, 29667024358722, 907210467221174 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,2
COMMENTS
Same series for 0,0 1,0 2,0 2,1 2,2 3,0 3,2 polyhexes.
LINKS
EXAMPLE
Maximal 10 X 10 X 10 example
............1
...........1.1
..........1.0.1
.........0.1.1.1
........0.0.0.0.0
.......0.1.1.1.0.0
......1.0.1.0.1.0.1
.....1.1.0.1.1.0.1.1
....1.0.1.0.1.0.1.0.1
...1.1.1.0.0.0.0.1.1.1
CROSSREFS
Sequence in context: A298030 A155369 A155404 * A155382 A155287 A155337
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified June 24 19:44 EDT 2024. Contains 373690 sequences. (Running on oeis4.)