Coefficients of g.f. for the class of C-trees.

A280767

Coefficients of g.f. for the class of C-trees.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =16a(4) =70a(5) =322a(6) =1556a(7) =39698a(8) =207217

External references