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Search: id:A155385
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| A155385 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 3,1 4,1 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 7, 19, 52, 181, 571, 2900, 15410, 91393, 670564, 5234213, 49806306, 539502855
(list; graph; listen)
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OFFSET
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6,2
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EXAMPLE
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Maximal 12 X 12 X 12 example
..............1
.............0.1
............1.0.1
...........1.0.1.1
..........1.0.0.1.0
.........1.1.0.1.0.1
........0.1.0.1.0.0.1
.......0.0.1.0.0.0.0.1
......1.0.0.1.0.0.0.1.1
.....0.1.0.0.0.0.0.0.1.0
....0.0.1.1.0.0.0.0.1.0.0
...0.0.0.1.1.1.1.0.1.0.0.0
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CROSSREFS
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Sequence in context: A100450 A155423 A155347 this_sequence A155345 A155309 A155419
Adjacent sequences: A155382 A155383 A155384 this_sequence A155386 A155387 A155388
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net) Jan 22 2009
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