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Search: id:A155435
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| A155435 |
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Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 3,3 4,2 4,3 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 4, 13, 28, 49, 105, 852, 6079, 29814, 128372, 780418, 9582912, 132900511, 1524452541, 17253579386, 257451880786, 5763064779401, 154341468962518
(list; graph; listen)
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OFFSET
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4,2
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EXAMPLE
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Maximal 9 X 9 X 9 example
...........0
..........1.0
.........0.1.1
........1.1.0.1
.......0.0.1.1.0
......1.1.0.0.0.1
.....1.0.1.0.1.1.0
....0.1.1.0.1.0.1.1
...0.1.0.1.0.1.1.0.0
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CROSSREFS
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Sequence in context: A056107 A155433 A155392 this_sequence A155371 A155355 A155356
Adjacent sequences: A155432 A155433 A155434 this_sequence A155436 A155437 A155438
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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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