A361384 - cp's OEIS frontend

A361384 a(n) is the number of distinct prime factors of the n-th unitary harmonic number.

n	a(n)
1	0
2	2
3	2
4	3
5	3
6	4
7	4
8	3
9	4
10	5
11	4
12	5
13	4
14	3
15	4
16	5
17	4
18	5
19	4
20	4
21	3
22	5
23	4
24	5
25	5
26	5
27	5
28	5
29	5
30	4
31	5
32	5
33	4
34	5
35	5
36	5
37	5
38	4
39	4
40	4
41	5
42	6
43	5
44	6
45	5
46	5
47	6
48	6
49	5
50	5
51	6
52	6
53	5
54	5
55	6
56	6
57	6
58	6
59	5
60	6
61	5
62	6
63	6
64	6
65	5
66	6
67	5
68	6
69	5
70	6
71	5
72	6
73	4
74	5
75	6
76	6
77	6
78	6
79	5
80	6
81	5
82	6
83	6
84	6
85	6
86	5
87	6

[0, 2, 2, 3, 3, 4, 4, 3, 4, 5, 4, 5, 4, 3, 4, 5, 4, 5, 4, 4, 3, 5, 4, 5, 5, 5, 5, 5, 5, 4, 5, 5, 4, 5, 5, 5, 5, 4, 4, 4, 5, 6, 5, 6, 5, 5, 6, 6, 5, 5, 6, 6, 5, 5, 6, 6, 6, 6, 5, 6, 5, 6, 6, 6, 5, 6, 5, 6, 5, 6, 5, 6, 4, 5, 6, 6, 6, 6, 5, 6, 5, 6, 6, 6, 6, 5, 6]

cp's OEIS Frontend

A361384 a(n) is the number of distinct prime factors of the n-th unitary harmonic number.

Table of values

List of values

n	a(n)
1	0
2	2
3	2
4	3
5	3
6	4
7	4
8	3
9	4
10	5
11	4
12	5
13	4
14	3
15	4
16	5
17	4
18	5
19	4
20	4
21	3
22	5
23	4
24	5
25	5
26	5
27	5
28	5
29	5
30	4
31	5
32	5
33	4
34	5
35	5
36	5
37	5
38	4
39	4
40	4
41	5
42	6
43	5
44	6
45	5
46	5
47	6
48	6
49	5
50	5
51	6
52	6
53	5
54	5
55	6
56	6
57	6
58	6
59	5
60	6
61	5
62	6
63	6
64	6
65	5
66	6
67	5
68	6
69	5
70	6
71	5
72	6
73	4
74	5
75	6
76	6
77	6
78	6
79	5
80	6
81	5
82	6
83	6
84	6
85	6
86	5
87	6

n	a(n)
1	0
2	2
3	2
4	3
5	3
6	4
7	4
8	3
9	4
10	5
11	4
12	5
13	4
14	3
15	4
16	5
17	4
18	5
19	4
20	4
21	3
22	5
23	4
24	5
25	5
26	5
27	5
28	5
29	5
30	4
31	5
32	5
33	4
34	5
35	5
36	5
37	5
38	4
39	4
40	4
41	5
42	6
43	5
44	6
45	5
46	5
47	6
48	6
49	5
50	5
51	6
52	6
53	5
54	5
55	6
56	6
57	6
58	6
59	5
60	6
61	5
62	6
63	6
64	6
65	5
66	6
67	5
68	6
69	5
70	6
71	5
72	6
73	4
74	5
75	6
76	6
77	6
78	6
79	5
80	6
81	5
82	6
83	6
84	6
85	6
86	5
87	6

n	a(n)
1	0
2	2
3	2
4	3
5	3
6	4
7	4
8	3
9	4
10	5
11	4
12	5
13	4
14	3
15	4
16	5
17	4
18	5
19	4
20	4
21	3
22	5
23	4
24	5
25	5
26	5
27	5
28	5
29	5
30	4
31	5
32	5
33	4
34	5
35	5
36	5
37	5
38	4
39	4
40	4
41	5
42	6
43	5
44	6
45	5
46	5
47	6
48	6
49	5
50	5
51	6
52	6
53	5
54	5
55	6
56	6
57	6
58	6
59	5
60	6
61	5
62	6
63	6
64	6
65	5
66	6
67	5
68	6
69	5
70	6
71	5
72	6
73	4
74	5
75	6
76	6
77	6
78	6
79	5
80	6
81	5
82	6
83	6
84	6
85	6
86	5
87	6