OFFSET
0,3
FORMULA
O.g.f.: x(1+x^2)(1-x^2+x^4)/(1-2x-x^2). - R. J. Mathar, Jul 07 2008.
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul Curtz, Sep 14 2007
EXTENSIONS
Edited by R. J. Mathar, Jul 07 2008
STATUS
approved