OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
FORMULA
G.f.: (-1 + 5*x - 5*x^2 - 7*x^3 - 4*x^4)/((3*x-1)*(x-1)^4). - Maksym Voznyy (voznyy(AT)mail.ru), Aug 14 2009
MAPLE
seq(3^n-n^3, n=0..25); # Zerinvary Lajos, Jul 01 2007
MATHEMATICA
lst={}; Do[AppendTo[lst, (3^n-n^3)], {n, 0, 5!}]; lst (* Vladimir Joseph Stephan Orlovsky, Jan 15 2009 *)
PROG
(Magma) [3^n-n^3: n in [0..30]]; // Vincenzo Librandi, May 14 2011
(PARI) a(n)=3^n-n^3 \\ Charles R Greathouse IV, Jul 02 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved