OFFSET
0,3
LINKS
FORMULA
G.f.: (1-3x-x^2)/(1-x)^2.
E.g.f.: exp(x)*(2-3x)-1.
a(n) = 2 - 3n - 0^n.
MATHEMATICA
LinearRecurrence[{2, -1}, {1, -1, -4}, 60] (* Harvey P. Dale, Apr 21 2016 *)
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Paul Barry, Sep 04 2005
STATUS
approved