A271205 - cp's OEIS frontend

A271205 Number T(m,n) of series-reduced free trees with n nodes of which exactly m >= 3 are leaves, m+1 <= n <= 2m-2.

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	2
11	2
12	2
13	1
14	2
15	4
16	4
17	2
18	1
19	3
20	6
21	10
22	8
23	4
24	1
25	3
26	9
27	17
28	22
29	15
30	6
31	1
32	4
33	12
34	30
35	47
36	53
37	32
38	11
39	1
40	4
41	16
42	44
43	91
44	127
45	121
46	66
47	18
48	1
49	5
50	20
51	67
52	158
53	282
54	346
55	292
56	142
57	37
58	1
59	5
60	25
61	91
62	258
63	539
64	841
65	921
66	688
67	306
68	66
69	1
70	6
71	30
72	126
73	397
74	978
75	1804
76	2498
77	2456
78	1662
79	672
80	135
81	1
82	6
83	36
84	163
85	588
86	1636
87	3550
88	5856
89	7260
90	6489
91	3978
92	1483
93	265
94	1
95	7
96	42
97	213
98	838
99	2638
100	6495
101	12554
102	18636
103	20946
104	17082
105	9629
106	3316
107	552
108	1
109	8

[1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 2, 4, 4, 2, 1, 3, 6, 10, 8, 4, 1, 3, 9, 17, 22, 15, 6, 1, 4, 12, 30, 47, 53, 32, 11, 1, 4, 16, 44, 91, 127, 121, 66, 18, 1, 5, 20, 67, 158, 282, 346, 292, 142, 37, 1, 5, 25, 91, 258, 539, 841, 921, 688, 306, 66, 1, 6, 30, 126, 397, 978, 1804, 2498, 2456, 1662, 672, 135, 1, 6, 36, 163, 588, 1636, 3550, 5856, 7260, 6489, 3978, 1483, 265, 1, 7, 42, 213, 838, 2638, 6495, 12554, 18636, 20946, 17082, 9629, 3316, 552, 1, 8]

cp's OEIS Frontend

A271205 Number T(m,n) of series-reduced free trees with n nodes of which exactly m >= 3 are leaves, m+1 <= n <= 2m-2.

Table of values

List of values