OFFSET
0,3
COMMENTS
Recurrence in A052947.
LINKS
FORMULA
From R. J. Mathar, Feb 01 2008: (Start)
O.g.f.: 1/2 + (1/2)*(-2*x-5*x^2+1)/(-1+x^2+2*x^3).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Jan 30 2008
STATUS
approved