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Search: id:A155405
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| A155405 |
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Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 7, 19, 37, 61, 179, 1570, 9884, 43279, 162911, 1062503, 13577598, 173995382, 1740580398, 16367827293, 223104829665, 4754997792283, 115851743032210
(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
............0
...........0.1
..........1.1.0
.........0.0.1.1
........0.1.1.0.0
.......0.0.0.1.0.0
......1.0.1.0.0.1.0
.....0.1.1.0.1.1.0.1
....1.1.0.1.0.0.1.1.0
...0.0.1.0.0.0.1.0.1.0
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CROSSREFS
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Sequence in context: A002407 A098484 A155443 this_sequence A155448 A155446 A155372
Adjacent sequences: A155402 A155403 A155404 this_sequence A155406 A155407 A155408
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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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