A017235 a(n) = (9*n + 6)^3.

216, 3375, 13824, 35937, 74088, 132651, 216000, 328509, 474552, 658503, 884736, 1157625, 1481544, 1860867, 2299968, 2803221, 3375000, 4019679, 4741632, 5545233, 6434856, 7414875, 8489664

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..10000
• Index entries for linear recurrences with constant coefficients, signature (4, -6, 4, -1).

Crossrefs

Cf. A000578 (n^3), A017233 (9*n+6).

Programs

Magma

[(9*n+6)^3: n in [0..35]]; // Vincenzo Librandi, Jul 25 2011

Mathematica

(9*Range[0,30]+6)^3 (* or *) LinearRecurrence[{4,-6,4,-1},{216,3375,13824,35937},30] (* Harvey P. Dale, Feb 14 2018 *)

Formula

G.f.: 27*(8 + 93*x + 60*x^2 + x^3)/(x-1)^4. - R. J. Mathar, Mar 20 2018