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Search: id:A155426
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| A155426 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,0 4,1 4,2 5,0 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 4, 10, 22, 55, 188, 612, 2433, 12227, 68641, 419235, 2949869, 24062426, 221080988, 2326692356
(list; graph; listen)
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OFFSET
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5,2
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EXAMPLE
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Maximal 10 X 10 X 10 example
............1
...........1.0
..........0.1.0
.........0.0.1.0
........1.1.1.0.1
.......1.0.0.0.0.1
......0.0.0.0.0.1.0
.....0.1.1.0.0.1.0.0
....0.1.0.1.0.0.1.1.1
...1.1.0.0.1.1.0.0.0.1
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CROSSREFS
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Sequence in context: A137247 A155407 A124697 this_sequence A155421 A155343 A155341
Adjacent sequences: A155423 A155424 A155425 this_sequence A155427 A155428 A155429
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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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