A292232 Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes such that the maximum of the node outdegrees equals six.

1, 2, 7, 23, 78, 261, 887, 3008, 10268, 35112, 120445, 413979, 1425919, 4919635, 17000553, 58828575, 203826882, 707008418, 2454916048, 8532126320, 29679297122, 103322632386, 359962092302, 1254914172463, 4377704183644, 15280415561913, 53365850603107

Offset: 6

Author

Alois P. Heinz, Sep 12 2017

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 6..1000
• Index entries for sequences related to rooted trees

Crossrefs

Column k=6 of A292086.

Programs

Maple

b:= proc(n, i, v, k) option remember; `if`(n=0,
      `if`(v=0, 1, 0), `if`(i<1 or v<1 or n A(n, 6)-A(n, 5):
seq(a(n), n=6..35);