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A185065 a(n) = n*(n^3 + 2). 6
0, 3, 20, 87, 264, 635, 1308, 2415, 4112, 6579, 10020, 14663, 20760, 28587, 38444, 50655, 65568, 83555, 105012, 130359, 160040, 194523, 234300, 279887, 331824, 390675, 457028, 531495, 614712, 707339, 810060, 923583, 1048640 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Numbers a(n) such that a(n)^3 = x^3*(x-2). The values of x are in A084380.
A058895(n)^3 + A068601(n)^3 + A033562(n)^3 = a(n)^3, for n > 0. - Vincenzo Librandi, Mar 13 2012
LINKS
FORMULA
G.f.: x*(3 + 5*x + 17*x^2 - x^3)/(1-x)^5. - Bruno Berselli, Mar 31 2011
EXAMPLE
20^3 = 10^3*(10-2); 87^3 = 29^3*(29-2).
MATHEMATICA
Table[n(n^3+2), {n, 0, 40}] (* Harvey P. Dale, Apr 11 2011 *)
PROG
(PARI) a(n)=n*(n^3+2) \\ Charles R Greathouse IV, Oct 07 2015
CROSSREFS
Sequence in context: A243208 A129549 A171673 * A227811 A363603 A092786
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Mar 31 2011
STATUS
approved

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Last modified March 29 09:28 EDT 2024. Contains 371268 sequences. (Running on oeis4.)