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Search: id:A008354
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| 0, 1, 14, 69, 216, 525, 1086, 2009, 3424, 5481, 8350, 12221, 17304, 23829, 32046, 42225, 54656, 69649, 87534, 108661, 133400, 162141, 195294, 233289, 276576, 325625, 380926, 442989, 512344, 589541
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OFFSET
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0,3
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COMMENT
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Omitting the leading 0, these are the partial sums of the centered icosahedral (or cuboctahedral) numbers (A005902). - Jonathan Vos Post (jvospost3(AT)gmail.com), Mar 14 2006
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FORMULA
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O.g.f.: x(1+x)(x^2+8x+1)/(1-x)^5. a(n)=n*A004068(n). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 10 2008
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MAPLE
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5*n^4/6 + n^2/6;
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CROSSREFS
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Cf. A005901, A005902, A008354.
Sequence in context: A071616 A008529 A075480 this_sequence A051879 A002423 A034554
Adjacent sequences: A008351 A008352 A008353 this_sequence A008355 A008356 A008357
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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) and J. H. Conway (conway(AT)math.princeton.edu)
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EXTENSIONS
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Definition corrected by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 10 2008
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