OFFSET
0,2
FORMULA
a(n)=9*a(n-1)-11*a(n-2) for n>2, a(0)=1, a(1)=2, a(2)=10. G.f.: (1-7x+3x^2)/(1-9x+11x^2).
CROSSREFS
KEYWORD
nonn
AUTHOR
Philippe Deléham, Nov 15 2008
STATUS
approved