OFFSET
0,2
COMMENTS
Binomial transform of A083301.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
Index entries for linear recurrences with constant coefficients, signature (8,9).
FORMULA
G.f.: (1-x)/((1-*9x)(1+x)).
E.g.f.: (4*exp(9*x) + exp(-x))/5.
PROG
(Magma) [(4*9^n+(-1)^n)/5: n in [0..25]]; // Vincenzo Librandi, Jun 29 2011
(PARI) a(n)=4*9^n\/5 \\ Charles R Greathouse IV, Jun 29 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Apr 24 2003
STATUS
approved