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Search: id:A155403
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| A155403 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,2 5,3 6,3 7,3 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 7, 19, 43, 130, 472, 2062, 9990, 51107, 296798, 2149983, 17713635
(list; graph; listen)
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OFFSET
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7,2
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EXAMPLE
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Maximal 10 X 10 X 10 example
............0
...........0.0
..........0.0.0
.........1.0.0.0
........0.1.0.0.0
.......1.0.1.1.1.1
......0.1.0.0.0.0.1
.....0.0.1.1.1.1.0.1
....0.0.0.0.0.0.1.0.0
...0.0.0.0.0.0.0.1.0.0
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CROSSREFS
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Sequence in context: A124700 A155336 A155427 this_sequence A155350 A155312 A155351
Adjacent sequences: A155400 A155401 A155402 this_sequence A155404 A155405 A155406
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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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