OFFSET
0,2
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (17,-79,63).
FORMULA
G.f.: 1/(1-9*x)-1/(1-7*x)+1/(1-x).
E.g.f.: exp(9*x)-exp(7*x)+exp(x).
a(n) = 16*a(n-1)-63*a(n-2)+48 with a(0) = 1, a(1) = 3. - Vincenzo Librandi, Jul 21 2010
MATHEMATICA
LinearRecurrence[{17, -79, 63}, {1, 3, 33}, 30] (* Harvey P. Dale, Feb 25 2015 *)
PROG
(PARI) a(n)=9^n-7^n+1 \\ Charles R Greathouse IV, Jun 11 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Jan 31 2009
STATUS
approved