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Search: id:A155420
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| A155420 |
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Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 4,2 5,3 5,4 6,3 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 7, 19, 37, 67, 234, 1126, 6422, 32270, 161586, 990365, 7766402, 74447984, 789199485, 8923308481
(list; graph; listen)
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OFFSET
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6,2
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EXAMPLE
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Maximal 11 X 11 X 11 example
.............0
............0.0
...........0.1.0
..........0.0.1.1
.........0.1.1.0.0
........1.1.0.0.0.1
.......0.0.1.0.1.1.0
......1.0.0.0.0.0.1.0
.....0.1.1.0.1.0.1.0.0
....0.1.0.1.1.0.0.1.1.0
...0.0.0.0.0.1.0.1.0.0.0
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CROSSREFS
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Sequence in context: A121091 A155394 A155412 this_sequence A155434 A155378 A155438
Adjacent sequences: A155417 A155418 A155419 this_sequence A155421 A155422 A155423
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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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