0,5

A trimmed tree is a tree with a forbidden limb of length 2.

A tree with a forbidden limb of length k is a tree where the path from any leaf inward hits a branching node or another leaf within k steps.

Index entries for sequences related to trees

E.g.f.: 1+x^3/2+x^4/2+B(x)-B(x)^2/2 where B(x) is e.g.f. of A052318.

Cf. A002955, A002988-A002992, A052318-A052329.

Sequence in context: A078985 A041173 A005512 this_sequence A079197 A113942 A073129

Adjacent sequences: A052317 A052318 A052319 this_sequence A052321 A052322 A052323

nonn

Christian G. Bower (bowerc(AT)usa.net), Dec 15 1999.