OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
Index entries for linear recurrences with constant coefficients, signature (2,15).
FORMULA
a(n) = (3*5^n + (-3)^n)/4.
G.f.: (1+x)/((1-5*x)*(1+3*x)).
E.g.f.: (3*exp(5*x) + exp(-3*x))/4.
PROG
(Magma) [(3*5^n+(-3)^n)/4: n in [0..25]]; // Vincenzo Librandi, Jun 29 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Apr 23 2003
STATUS
approved