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Search: id:A100146
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| A100146 |
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Structured great rhombicubeoctahedral numbers. |
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+0
3
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| 1, 48, 221, 600, 1265, 2296, 3773, 5776, 8385, 11680, 15741, 20648, 26481, 33320, 41245, 50336, 60673, 72336, 85405, 99960, 116081, 133848, 153341, 174640, 197825, 222976, 250173, 279496, 311025, 344840, 381021, 419648
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OFFSET
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1,2
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FORMULA
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a(n)=(1/6)*(80*n^3-102*n^2+28*n)
Contribution from Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Sep 08 2009: (Start)
a(n)=((n-1)+1)*(5*(n-1)+3)*(8*(n-1)+1)/3
G.f.: x*(1+44*x+35*x^2)/(1-x)^4 (End)
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CROSSREFS
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Cf. A100145, A100147 for adjacent structured Archimedean solids; and A100145 for more on structured polyhedral numbers.
Sequence in context: A157923 A072254 A062248 this_sequence A157913 A052683 A115056
Adjacent sequences: A100143 A100144 A100145 this_sequence A100147 A100148 A100149
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KEYWORD
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easy,nonn
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AUTHOR
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James A. Record (james.record(AT)gmail.com). Nov 07, 2004.
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