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Search: id:A155448
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| A155448 |
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Number of ways to place zero or more nonadjacent 2,0 3,1 4,2 4,3 4,4 5,2 6,2 7,2 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, 198, 925, 4932, 25307, 120759, 705438, 5070257, 44891211, 447175598, 4812407060, 57607358493
(list; graph; listen)
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OFFSET
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7,2
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EXAMPLE
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Maximal 12 X 12 X 12 example
..............0
.............0.0
............0.0.1
...........0.0.1.0
..........1.1.1.0.0
.........0.0.0.1.0.0
........0.0.1.0.1.0.0
.......0.0.1.0.0.1.0.1
......0.0.1.0.0.0.0.1.0
.....1.1.1.0.1.1.1.1.0.0
....0.0.0.1.0.0.0.0.1.0.0
...0.0.0.0.1.0.0.0.0.1.0.0
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CROSSREFS
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Sequence in context: A098484 A155443 A155405 this_sequence A155446 A155372 A155373
Adjacent sequences: A155445 A155446 A155447 this_sequence A155449 A155450 A155451
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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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