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A055820
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T(n,n-3), array T as in A055818.
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1
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1, 11, 24, 43, 69, 103, 146, 199, 263, 339, 428, 531, 649, 783, 934, 1103, 1291, 1499, 1728, 1979, 2253, 2551, 2874, 3223, 3599, 4003, 4436, 4899, 5393, 5919, 6478, 7071, 7699, 8363, 9064, 9803, 10581, 11399, 12258
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 3..10000
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FORMULA
| For n>3, a(n) = (n^3+3n^2-10n-6)/6.
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MATHEMATICA
| Join[{1}, Table[(n^3+3n^2-10n-6)/6, {n, 4, 50}]] (* or *) Join[{1}, LinearRecurrence[ {4, -6, 4, -1}, {11, 24, 43, 69}, 50]] (* From Harvey P. Dale, Sep 18 2011 *)
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CROSSREFS
| Sequence in context: A061043 A098603 A053061 * A114167 A108302 A182689
Adjacent sequences: A055817 A055818 A055819 * A055821 A055822 A055823
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KEYWORD
| nonn,easy
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu), May 28 2000
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