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Search: id:A155258
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| A155258 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,0 4,0 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 7, 25, 90, 688, 4109, 25041, 287360, 3402527, 48602011, 1011814868, 22922047752
(list; graph; listen)
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OFFSET
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4,2
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EXAMPLE
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Maximal 13 X 13 X 13 example
...............1
..............1.0
.............1.0.1
............1.0.1.1
...........1.1.0.0.1
..........0.0.0.0.0.1
.........1.0.1.1.0.0.1
........1.0.0.1.0.1.0.0
.......1.0.1.0.1.0.1.0.1
......1.0.1.1.0.1.0.1.0.1
.....1.1.0.0.1.0.1.0.1.0.1
....0.0.0.1.0.1.0.0.1.1.0.1
...1.1.1.1.1.0.1.0.0.0.0.1.1
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CROSSREFS
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Sequence in context: A155294 A155233 A146933 this_sequence A138729 A035509 A141627
Adjacent sequences: A155255 A155256 A155257 this_sequence A155259 A155260 A155261
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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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