A384420 - cp's OEIS frontend

A384420 The number of exponentially squarefree prime powers (not including 1) that divide n.

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

[0, 1, 1, 2, 1, 2, 1, 3, 2, 2, 1, 3, 1, 2, 2, 3, 1, 3, 1, 3, 2, 2, 1, 4, 2, 2, 3, 3, 1, 3, 1, 5, 2, 2, 2, 4, 1, 2, 2, 4, 1, 3, 1, 3, 3, 2, 1, 4, 2, 3, 2, 3, 1, 4, 2, 4, 2, 2, 1, 4, 1, 2, 3, 6, 2, 3, 1, 3, 2, 3, 1, 5, 1, 2, 3, 3, 2, 3, 1, 4, 3, 2, 1, 4, 2, 2, 2]

cp's OEIS Frontend

A384420 The number of exponentially squarefree prime powers (not including 1) that divide n.

Table of values

List of values

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

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

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