A024065 a(n) = 6^n - n^3.

1, 5, 28, 189, 1232, 7651, 46440, 279593, 1679104, 10076967, 60465176, 362795725, 2176780608, 13060691819, 78364161352, 470184981201, 2821109903360, 16926659439823, 101559956662584, 609359740003637

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..500

Index entries for linear recurrences with constant coefficients, signature (10,-30,40,-25,6).

Formula

G.f.: (-1 - 7*x^4 - 19*x^3 - 8*x^2 + 5*x)/((6*x-1)*(x-1)^4). - Maksym Voznyy (voznyy(AT)mail.ru), Jul 26 2009

Mathematica

Table[6^n-n^3, {n, 0, 20}] (* Harvey P. Dale, Jun 15 2019 *)

Prog

(Magma) [6^n-n^3: n in [0..25]]; // Vincenzo Librandi, Jul 03 2011

Crossrefs

Sequence in context: A070779 A189487 A367049 * A003467 A240770 A318364

Adjacent sequences: A024062 A024063 A024064 * A024066 A024067 A024068

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved