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Search: id:A092966
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| A092966 |
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Number of interior balls in a truncated tetrahedral arrangement. |
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+0
1
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| 0, 10, 52, 149, 324, 600, 1000, 1547, 2264, 3174, 4300, 5665, 7292, 9204, 11424, 13975, 16880, 20162, 23844, 27949, 32500, 37520, 43032, 49059, 55624, 62750, 70460, 78777, 87724, 97324, 107600, 118575, 130272, 142714, 155924, 169925, 184740, 200392, 216904
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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H. S. M. Coxeter, Polyhedral numbers, pp. 25-35 of R. S. Cohen, J. J. Stachel and M. W. Wartofsky, eds., For Dirk Struik: Scientific, historical and political essays in honor of Dirk J. Struik, Reidel, Dordrecht, 1974.
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FORMULA
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(1/6)*(n-1)*(23*n^2-19*n+6).
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CROSSREFS
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Sequence in context: A041186 A058827 A028994 this_sequence A050494 A119543 A063899
Adjacent sequences: A092963 A092964 A092965 this_sequence A092967 A092968 A092969
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KEYWORD
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nonn
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AUTHOR
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njas, May 08 2004
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