OFFSET
0,2
LINKS
FORMULA
a(n)=(-6)*a(n-1)+12 with a(0)=1. a(0)=1, a(1)=6, a(n)=6*a(n-2)-5*a(n-1). G.f.: (1+11x)/(1+5x-6x^2). a(n)= Sum_{k, 0<=k<=n} A112555(n,k)*5^(n-k).
MATHEMATICA
LinearRecurrence[{-5, 6}, {1, 6}, 20] (* Harvey P. Dale, Jan 07 2016 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Philippe Deléham, Sep 23 2009
STATUS
approved