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Search: id:A155404
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| A155404 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 2,2 3,0 3,1 4,0 4,2 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 4, 10, 22, 40, 135, 446, 2376, 12035, 65714, 364923, 2734456, 23495580, 245925457, 2738475904, 35447846068, 514467522739
(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
...........1
..........1.0
.........0.1.1
........1.1.0.0
.......1.0.1.0.1
......0.0.0.0.0.1
.....1.0.1.0.1.1.0
....0.1.1.0.0.0.1.1
...1.1.0.1.1.0.1.0.1
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CROSSREFS
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Sequence in context: A008248 A061777 A155369 this_sequence A155360 A155382 A155287
Adjacent sequences: A155401 A155402 A155403 this_sequence A155405 A155406 A155407
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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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