A283826 - cp's OEIS frontend

A283826 Irregular triangle read by rows: T(n,k) = number of trees on n nodes with radius k, n>=1, 1 <= k <= floor(n/2).

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	1
7	2
8	1
9	4
10	1
11	1
12	7
13	3
14	1
15	11
16	10
17	1
18	1
19	17
20	25
21	4
22	1
23	25
24	61
25	18
26	1
27	1
28	36
29	132
30	61
31	5
32	1
33	50
34	277
35	194
36	28
37	1
38	1
39	70
40	554
41	553
42	117
43	6
44	1
45	94
46	1077
47	1495
48	451
49	40
50	1
51	1
52	127
53	2034
54	3823
55	1552
56	197
57	7
58	1
59	168
60	3770
61	9427
62	5020
63	879
64	54
65	1
66	1
67	222
68	6853
69	22466
70	15289
71	3485
72	305
73	8
74	1

[0, 1, 1, 1, 1, 1, 2, 1, 4, 1, 1, 7, 3, 1, 11, 10, 1, 1, 17, 25, 4, 1, 25, 61, 18, 1, 1, 36, 132, 61, 5, 1, 50, 277, 194, 28, 1, 1, 70, 554, 553, 117, 6, 1, 94, 1077, 1495, 451, 40, 1, 1, 127, 2034, 3823, 1552, 197, 7, 1, 168, 3770, 9427, 5020, 879, 54, 1, 1, 222, 6853, 22466, 15289, 3485, 305, 8, 1]

cp's OEIS Frontend

A283826 Irregular triangle read by rows: T(n,k) = number of trees on n nodes with radius k, n>=1, 1 <= k <= floor(n/2).

Table of values

List of values