A331991 - cp's OEIS frontend

A331991 Number of semi-lone-child-avoiding achiral rooted trees with n vertices.

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

[1, 1, 1, 1, 2, 1, 3, 1, 3, 2, 4, 1, 5, 1, 5, 4, 4, 1, 7, 1, 7, 5, 6, 1, 7, 3, 7, 5, 7, 1, 13, 1, 8, 6, 6, 6, 10, 1, 9, 7, 9, 1, 15, 1, 12, 12, 8, 1, 12, 4, 13, 6, 11, 1, 15, 7, 13, 9, 9, 1, 17, 1, 15, 15, 9, 8, 21, 1, 13, 8, 16, 1, 18, 1, 12, 16, 11, 8, 21, 1]

cp's OEIS Frontend

A331991 Number of semi-lone-child-avoiding achiral rooted trees with n vertices.

Table of values

List of values

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

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

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