A117357 - cp's OEIS frontend

A117357 Number of rooted trees with total weight n, where the weight of a node at height k is k (with the root considered to be at level 1).

n	a(n)
0	0
1	1
2	0
3	1
4	0
5	1
6	1
7	1
8	1
9	2
10	2
11	3
12	3
13	4
14	5
15	7
16	7
17	11
18	12
19	16
20	19
21	25
22	29
23	38
24	46
25	59
26	72
27	91
28	110
29	141
30	171
31	214
32	264
33	331
34	405
35	509
36	623
37	777
38	957
39	1189
40	1462
41	1822
42	2235
43	2774
44	3418
45	4228
46	5205
47	6442
48	7922
49	9793
50	12053
51	14870
52	18298
53	22572
54	27747
55	34203

[0, 1, 0, 1, 0, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 7, 7, 11, 12, 16, 19, 25, 29, 38, 46, 59, 72, 91, 110, 141, 171, 214, 264, 331, 405, 509, 623, 777, 957, 1189, 1462, 1822, 2235, 2774, 3418, 4228, 5205, 6442, 7922, 9793, 12053, 14870, 18298, 22572, 27747, 34203]

cp's OEIS Frontend

A117357 Number of rooted trees with total weight n, where the weight of a node at height k is k (with the root considered to be at level 1).

Table of values

List of values