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Search: id:A155433
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| A155433 |
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,2 3,0 3,3 4,1 4,3 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, 76, 487, 3766, 20956, 91261, 385483, 3099937, 40032793, 511624885, 5661397930, 61479664849, 927273309259, 20003424034360, 509150633289499, 13132668672579046, 346049894030528596
(list; graph; listen)
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OFFSET
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4,2
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EXAMPLE
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Maximal 10 X 10 X 10 example
............0
...........0.0
..........1.1.1
.........1.0.0.1
........0.0.0.1.0
.......0.0.1.1.0.0
......1.1.0.0.0.1.1
.....1.0.0.0.0.0.0.1
....1.0.0.1.0.1.0.0.1
...0.1.1.1.0.0.1.1.1.0
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CROSSREFS
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Sequence in context: A024970 A079430 A056107 this_sequence A155392 A155435 A155371
Adjacent sequences: A155430 A155431 A155432 this_sequence A155434 A155435 A155436
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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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