A017055 a(n) = (7*n + 6)^3.

216, 2197, 8000, 19683, 39304, 68921, 110592, 166375, 238328, 328509, 438976, 571787, 729000, 912673, 1124864, 1367631, 1643032, 1953125, 2299968, 2685619, 3112136, 3581577, 4096000, 4657463, 5268024

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. A017053 (7*n+6).

Programs

Magma

[(7*n+6)^3: n in [0..40]]; // Vincenzo Librandi, Jul 10 2011

Mathematica

(7*Range[0,30]+6)^3 (* or *) LinearRecurrence[{4,-6,4,-1},{216,2197,8000,19683},30] (* Harvey P. Dale, Mar 06 2019 *)

Formula

G.f.: ( 216 + 1333*x + 508*x^2 + x^3 ) / (x-1)^4. - R. J. Mathar, Aug 01 2014