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Search: id:A011894
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| 0, 0, 0, 0, 2, 5, 10, 17, 28, 42, 60, 82, 110, 143, 182, 227, 280, 340, 408, 484, 570, 665, 770, 885, 1012, 1150, 1300, 1462, 1638, 1827, 2030, 2247, 2480, 2728, 2992, 3272, 3570, 3885, 4218, 4569, 4940
(list; graph; listen)
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OFFSET
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0,5
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COMMENT
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a(n+1)=floor[(n^3-n)/12] is an upper bound for the Kirchhoff index of a circulant graph with n vertices [Zhang&Yang] - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 26 2007
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LINKS
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H. Zhang and Y. Yang, Resistance Distance and Kirchhoff Index in Circulant Graphs, Int. J. Quant. Chem. 107 (2007) 330-339.
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MAPLE
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seq(floor(binomial(n, 3)/2), n=0..40); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 12 2009]
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CROSSREFS
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Sequence in context: A056871 A007504 A049688 this_sequence A071602 A046485 A109377
Adjacent sequences: A011891 A011892 A011893 this_sequence A011895 A011896 A011897
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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Removed duplicate of the Maple program - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 25 2009
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