OFFSET
0,2
COMMENTS
Binomial transform of A081656.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (10,-21).
FORMULA
G.f.: (1+x)/((1-7*x)*(1-3*x)).
E.g.f. 2*exp(7*x)-exp(3*x).
a(0)=0, a(1)=11; for n>1, a(n) = 10*a(n-1) -21*a(n-2). - Vincenzo Librandi Aug 10 2013
MATHEMATICA
CoefficientList[Series[(1 + x) / ((1 - 7 x) (1 - 3 x)), {x, 0, 40}], x] (* Vincenzo Librandi, Aug 10 2013 *)
PROG
(Magma) [2*7^n-3^n: n in [0..30]]; // Vincenzo Librandi, Dec 05 2012
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 26 2003
STATUS
approved