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A085744
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a(n) = A000217(n^3) - n^3.
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4
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0, 0, 28, 351, 2016, 7750, 23220, 58653, 130816, 265356, 499500, 885115, 1492128, 2412306, 3763396, 5693625, 8386560, 12066328, 17003196, 23519511, 31996000, 42878430, 56684628, 74011861, 95544576, 122062500, 154449100, 193700403, 240934176, 297399466, 364486500
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refs;
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history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..10000
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FORMULA
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a(n) = n^3*(n^3 - 1)/2. - Vincenzo Librandi, Sep 14 2011
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EXAMPLE
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a(3) = T(3^3) - 3^3 = T(27) - 27 = 378 - 27 = 351.
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MATHEMATICA
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Table[(n^6-n^3)/2, {n, 0, 60}] (* Vladimir Joseph Stephan Orlovsky, Feb 28 2011 *)
(#(#-1))/2&/@(Range[0, 30]^3) (* Harvey P. Dale, Dec 26 2021 *)
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PROG
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(PARI) t(n)=n*(n+1)/2; for(n=0, 30, print1(t(n^3)-n^3", "))
(MAGMA) [n^3*(n^3-1)/2: n in [0..40]]; // Vincenzo Librandi, Sep 14 2011
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CROSSREFS
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Cf. A000217.
Sequence in context: A022720 A272174 A173421 * A163719 A138452 A276286
Adjacent sequences: A085741 A085742 A085743 * A085745 A085746 A085747
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KEYWORD
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nonn,easy
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AUTHOR
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Jon Perry, Jul 21 2003
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STATUS
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approved
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