OFFSET
1,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (7,0,1,-7).
FORMULA
G.f.: x*(2+3*x) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Nov 21 2011
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved