OFFSET
0,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (13,-44,32).
FORMULA
G.f.: 1/(1-x)+1/(1-4*x)+1/(1-8*x). E.g.f.: e^x+e^(4*x)+e^(8*x). - Mohammad K. Azarian, Dec 26 2008
a(n)=12*a(n-1)-32*a(n-2)+21 with a(0)=3, a(1)=13. - Vincenzo Librandi, Jul 21 2010
a(0)=3, a(1)=13, a(2)=81, a(n)=13*a(n-1)-44*a(n-2)+32*a(n-3). - Harvey P. Dale, Jun 30 2011
MATHEMATICA
Table[1^n + 4^n + 8^n, {n, 0, 20}]
LinearRecurrence[{13, -44, 32}, {3, 13, 81}, 20] (* Harvey P. Dale, Jun 30 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Robert G. Wilson v, Aug 23 2002
STATUS
approved