OFFSET
0,2
COMMENTS
Binomial transform of A083301.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
Index to sequences with linear recurrences with constant coefficients, signature (8,9).
FORMULA
a(n)=(4*9^n+(-1)^n)/5 G.f. (1-x)/((1-9x)(1+x)) E.g.f. (4exp(9x)+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