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A117197 a(n) = (n^3 - 1)^3. 0
0, 343, 17576, 250047, 1906624, 9938375, 40001688, 133432831, 385828352, 997002999, 2352637000, 5150827583, 10590025536, 20638466407, 38409197624, 68669157375, 118515478528, 198257271191, 322546580712, 511808023999 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Cubes a(1-1),a(8-1),a(27-1),a(64-1),...

LINKS

Table of n, a(n) for n=1..20.

FORMULA

a(n) = n^9 - 3n^6 + 3n^3 - 1.

G.f.: (x^9-2*x^8+694*x^7+14902*x^6+87160*x^5+155914*x^4+89722*x^3+14146*x^2+ 343*x)/(x-1)^10. - Harvey P. Dale, Mar 25 2013 [corrected by Georg Fischer, May 15 2019]

a(n) = A000578(A068601(n)). - Michel Marcus, May 15 2019

MATHEMATICA

(Range[20]^3-1)^3 (* Harvey P. Dale, Mar 25 2013 *)

CROSSREFS

Cf. A000578 (n^3), A068601 (n^3-1).

Sequence in context: A134263 A270820 A140250 * A269554 A046236 A294663

Adjacent sequences:  A117194 A117195 A117196 * A117198 A117199 A117200

KEYWORD

nonn,easy

AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 21 2006

EXTENSIONS

Edited and corrected by Franklin T. Adams-Watters, Apr 26 2006

STATUS

approved

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Last modified October 26 05:34 EDT 2021. Contains 348256 sequences. (Running on oeis4.)