OFFSET
0,2
LINKS
FORMULA
a(n) = 11*a(n-1) - 5 (with a(0)=1). - Vincenzo Librandi, Nov 17 2010
G.f.: (1-6*x)/((1-x)*(1-11*x)). - Colin Barker, May 04 2012
From Elmo R. Oliveira, Aug 23 2024: (Start)
E.g.f.: exp(6*x)*cosh(5*x).
a(n) = A034524(n)/2.
a(n) = 12*a(n-1) - 11*a(n-2) for n > 1. (End)
PROG
(PARI) a(n)=(11^n+1)/2 \\ Charles R Greathouse IV, Aug 23 2024
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
a(18)-a(20) from Elmo R. Oliveira, Aug 23 2024
STATUS
approved