OFFSET
0,4
LINKS
T. Lu, The enumeration of trees with and without given limbs, Discr. Math., 154 (1996), 153-165, Example 4.
FORMULA
G.f. x^3+ g014271(x) -g014271(x)^2, where g014271 is the o.g.f. of A014271. - R. J. Mathar, Feb 27 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved