A070556 - cp's OEIS frontend

A070556 a(n) = cototient(totient(n)).

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

[0, 0, 1, 1, 2, 1, 4, 2, 4, 2, 6, 2, 8, 4, 4, 4, 8, 4, 12, 4, 8, 6, 12, 4, 12, 8, 12, 8, 16, 4, 22, 8, 12, 8, 16, 8, 24, 12, 16, 8, 24, 8, 30, 12, 16, 12, 24, 8, 30, 12, 16, 16, 28, 12, 24, 16, 24, 16, 30, 8, 44, 22, 24, 16, 32, 12, 46, 16, 24, 16, 46, 16, 48]

cp's OEIS Frontend

A070556 a(n) = cototient(totient(n)).

Table of values

List of values

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

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

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