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Search: id:A155285
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| A155285 |
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 13, 37, 73, 258, 1871, 22758, 161452, 1241904, 16300245, 324762872, 7210518148, 157052254320, 4356147792581
(list; graph; listen)
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OFFSET
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4,2
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EXAMPLE
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Maximal 11 X 11 X 11 example
.............0
............1.1
...........1.0.1
..........0.0.0.1
.........1.1.0.1.0
........1.0.0.0.0.1
.......1.0.0.1.0.0.1
......0.1.1.0.1.1.1.0
.....1.0.0.0.0.0.0.0.1
....1.0.0.1.0.0.1.0.0.1
...0.1.1.1.0.0.0.1.1.1.0
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CROSSREFS
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Sequence in context: A158864 A003154 A083577 this_sequence A155262 A155301 A155284
Adjacent sequences: A155282 A155283 A155284 this_sequence A155286 A155287 A155288
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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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