A384421 - cp's OEIS frontend

A384421 The number of exponentially squarefree prime powers (not including 1) that unitarily divide n.

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

[0, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 2, 0, 1, 2, 1, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 3, 1, 2, 2, 2, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 3, 1, 2, 2, 1, 2, 3, 1, 2, 2, 3, 1, 2, 1, 2, 2, 2, 2, 3, 1, 1, 0, 2, 1, 3, 2, 2, 2]

cp's OEIS Frontend

A384421 The number of exponentially squarefree prime powers (not including 1) that unitarily divide n.

Table of values

List of values

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

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

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