A181627 - cp's OEIS frontend

A181627 Number of iterations of phi(n) if n is a perfect totient number.

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

[2, 3, 4, 4, 5, 5, 6, 7, 6, 8, 7, 8, 8, 7, 8, 10, 11, 11, 11, 11, 9, 10, 12, 10, 14, 13, 11, 16, 14, 12, 16, 17, 13, 14, 19, 15, 20, 16, 17, 18, 18, 19, 24, 19, 20, 21, 22, 29, 32, 28, 30, 22, 29, 23, 30, 32, 24, 25, 31, 35, 26, 34, 35, 27]

cp's OEIS Frontend

A181627 Number of iterations of phi(n) if n is a perfect totient number.

Table of values

List of values

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

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

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