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A155232 Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 10, 22, 40, 361, 2821, 19057, 110575, 1423822, 26284909, 502358770, 9341556682, 253322462407, 10114422061267, 485429682957349, 25616146962812161, 1724462843271452173, 157410261704230494205 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
LINKS
EXAMPLE
Maximal 13 X 13 X 13 example
...............1
..............1.1
.............1.0.1
............0.0.0.0
...........1.0.1.1.1
..........1.0.0.0.1.0
.........1.1.1.0.1.0.1
........0.0.0.0.0.0.0.1
.......1.0.1.0.0.0.1.1.1
......0.1.1.0.0.0.0.0.0.0
.....1.0.1.0.1.0.1.0.1.0.1
....1.0.0.0.0.1.0.1.1.0.0.1
...1.1.1.0.1.1.1.0.1.0.1.1.1
CROSSREFS
Sequence in context: A155287 A155337 A155402 * A188281 A227327 A023609
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
STATUS
approved

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Last modified May 20 21:47 EDT 2024. Contains 372720 sequences. (Running on oeis4.)