A320179 - cp's OEIS frontend

A320179 Regular triangle where T(n,k) is the number of unlabeled series-reduced rooted trees with n leaves in which every leaf is at height k.

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	0
17	1
18	3
19	0
20	0
21	0
22	0
23	1
24	3
25	0
26	0
27	0
28	0
29	0
30	1
31	6
32	1
33	0
34	0
35	0
36	0
37	0
38	1
39	7
40	1
41	0
42	0
43	0
44	0
45	0
46	0
47	1
48	11
49	4
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	1
58	13
59	6
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	1
69	20
70	16
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	1
81	23
82	23
83	0
84	0
85	0

[1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 3, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 1, 6, 1, 0, 0, 0, 0, 0, 1, 7, 1, 0, 0, 0, 0, 0, 0, 1, 11, 4, 0, 0, 0, 0, 0, 0, 0, 1, 13, 6, 0, 0, 0, 0, 0, 0, 0, 0, 1, 20, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 23, 23, 0, 0, 0]

cp's OEIS Frontend

A320179 Regular triangle where T(n,k) is the number of unlabeled series-reduced rooted trees with n leaves in which every leaf is at height k.

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	0
17	1
18	3
19	0
20	0
21	0
22	0
23	1
24	3
25	0
26	0
27	0
28	0
29	0
30	1
31	6
32	1
33	0
34	0
35	0
36	0
37	0
38	1
39	7
40	1
41	0
42	0
43	0
44	0
45	0
46	0
47	1
48	11
49	4
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	1
58	13
59	6
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	1
69	20
70	16
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	1
81	23
82	23
83	0
84	0
85	0

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	0
17	1
18	3
19	0
20	0
21	0
22	0
23	1
24	3
25	0
26	0
27	0
28	0
29	0
30	1
31	6
32	1
33	0
34	0
35	0
36	0
37	0
38	1
39	7
40	1
41	0
42	0
43	0
44	0
45	0
46	0
47	1
48	11
49	4
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	1
58	13
59	6
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	1
69	20
70	16
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	1
81	23
82	23
83	0
84	0
85	0

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	0
17	1
18	3
19	0
20	0
21	0
22	0
23	1
24	3
25	0
26	0
27	0
28	0
29	0
30	1
31	6
32	1
33	0
34	0
35	0
36	0
37	0
38	1
39	7
40	1
41	0
42	0
43	0
44	0
45	0
46	0
47	1
48	11
49	4
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	1
58	13
59	6
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	1
69	20
70	16
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	1
81	23
82	23
83	0
84	0
85	0