A300660 - cp's OEIS frontend

A300660 Number of unlabeled rooted phylogenetic trees with n (leaf-) nodes such that for each inner node all children are either leaves or roots of distinct subtrees.

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	6
6	13
7	30
8	72
9	182
10	467
11	1222
12	3245
13	8722
14	23663
15	64758
16	178459
17	494922
18	1380105
19	3867414
20	10884821
21	30756410
22	87215419
23	248117618
24	707952902
25	2025479210
26	5809424605
27	16700811214
28	48113496645
29	138884979562
30	401645917999
31	1163530868090

[0, 1, 1, 2, 3, 6, 13, 30, 72, 182, 467, 1222, 3245, 8722, 23663, 64758, 178459, 494922, 1380105, 3867414, 10884821, 30756410, 87215419, 248117618, 707952902, 2025479210, 5809424605, 16700811214, 48113496645, 138884979562, 401645917999, 1163530868090]

cp's OEIS Frontend

A300660 Number of unlabeled rooted phylogenetic trees with n (leaf-) nodes such that for each inner node all children are either leaves or roots of distinct subtrees.

Table of values

List of values