OFFSET
0,1
LINKS
FORMULA
From Benedict W. J. Irwin, May 30 2016: (Start)
G.f.: (z-10)/(z^2+z-1).
E.g.f: (2*exp(z/2)/5)*(25*cosh(sqrt(5)*z/2)+4*sqrt(5)*sinh(sqrt(5)*z/2)).
a(n) = (2^(-n)/sqrt(5))*((1-sqrt(5))^n*(5*sqrt(5)-4)+(1+sqrt(5))^n*(5*sqrt(5)+4)).
(End)
a(n) = Lucas(n+4) - Fibonacci(n-4). - Greg Dresden and Erin Addison, Mar 02 2022
MATHEMATICA
LinearRecurrence[{1, 1}, {10, 9}, 100]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vladimir Joseph Stephan Orlovsky, Feb 28 2011
STATUS
approved