OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (9,0,1,-9).
FORMULA
G.f.: x*(1+x+2*x^2) / ( (x-1)*(9*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 29 2015
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
EXTENSIONS
Corrected by Franklin T. Adams-Watters, Oct 25 2006
STATUS
approved