A292213 Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than seven.

0, 1, 1, 2, 5, 12, 33, 90, 260, 763, 2302, 7035, 21854, 68581, 217485, 695229, 2238965, 7255380, 23643501, 77426852, 254678757, 841028918, 2787320206, 9267764857, 30906754731, 103350631437, 346465277423, 1164150100182, 3920004155435, 13225916804136

Offset: 0

Author

Alois P. Heinz, Sep 11 2017

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..1000
• Index entries for sequences related to rooted trees

Crossrefs

Column k=7 of A292085.

Programs

Maple

b:= proc(n, i, v) option remember; `if`(n=0,
      `if`(v=0, 1, 0), `if`(i<1 or v<1 or n