A055290 - cp's OEIS frontend

A055290 Triangle of trees with n nodes and k leaves, 2 <= k <= n.

n	a(n)
2	1
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	2
14	2
15	1
16	0
17	1
18	3
19	4
20	2
21	1
22	0
23	1
24	4
25	8
26	6
27	3
28	1
29	0
30	1
31	5
32	14
33	14
34	9
35	3
36	1
37	0
38	1
39	7
40	23
41	32
42	26
43	12
44	4
45	1
46	0
47	1
48	8
49	36
50	64
51	66
52	39
53	16
54	4
55	1
56	0
57	1
58	10
59	54
60	123
61	158
62	119
63	60
64	20
65	5
66	1
67	0
68	1
69	12
70	78
71	219
72	350
73	325
74	202
75	83
76	25
77	5
78	1
79	0

[1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 2, 2, 1, 0, 1, 3, 4, 2, 1, 0, 1, 4, 8, 6, 3, 1, 0, 1, 5, 14, 14, 9, 3, 1, 0, 1, 7, 23, 32, 26, 12, 4, 1, 0, 1, 8, 36, 64, 66, 39, 16, 4, 1, 0, 1, 10, 54, 123, 158, 119, 60, 20, 5, 1, 0, 1, 12, 78, 219, 350, 325, 202, 83, 25, 5, 1, 0]

cp's OEIS Frontend

A055290 Triangle of trees with n nodes and k leaves, 2 <= k <= n.

Table of values

List of values

n	a(n)
2	1
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	2
14	2
15	1
16	0
17	1
18	3
19	4
20	2
21	1
22	0
23	1
24	4
25	8
26	6
27	3
28	1
29	0
30	1
31	5
32	14
33	14
34	9
35	3
36	1
37	0
38	1
39	7
40	23
41	32
42	26
43	12
44	4
45	1
46	0
47	1
48	8
49	36
50	64
51	66
52	39
53	16
54	4
55	1
56	0
57	1
58	10
59	54
60	123
61	158
62	119
63	60
64	20
65	5
66	1
67	0
68	1
69	12
70	78
71	219
72	350
73	325
74	202
75	83
76	25
77	5
78	1
79	0

n	a(n)
2	1
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	2
14	2
15	1
16	0
17	1
18	3
19	4
20	2
21	1
22	0
23	1
24	4
25	8
26	6
27	3
28	1
29	0
30	1
31	5
32	14
33	14
34	9
35	3
36	1
37	0
38	1
39	7
40	23
41	32
42	26
43	12
44	4
45	1
46	0
47	1
48	8
49	36
50	64
51	66
52	39
53	16
54	4
55	1
56	0
57	1
58	10
59	54
60	123
61	158
62	119
63	60
64	20
65	5
66	1
67	0
68	1
69	12
70	78
71	219
72	350
73	325
74	202
75	83
76	25
77	5
78	1
79	0

n	a(n)
2	1
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	2
14	2
15	1
16	0
17	1
18	3
19	4
20	2
21	1
22	0
23	1
24	4
25	8
26	6
27	3
28	1
29	0
30	1
31	5
32	14
33	14
34	9
35	3
36	1
37	0
38	1
39	7
40	23
41	32
42	26
43	12
44	4
45	1
46	0
47	1
48	8
49	36
50	64
51	66
52	39
53	16
54	4
55	1
56	0
57	1
58	10
59	54
60	123
61	158
62	119
63	60
64	20
65	5
66	1
67	0
68	1
69	12
70	78
71	219
72	350
73	325
74	202
75	83
76	25
77	5
78	1
79	0