A053148 - cp's OEIS frontend

A053148 When cototient function (A051953) is iterated with initial value A002110(n), a(n) = exponent of the largest power of 2 which appears in the iteration.

n	a(n)
1	1
2	2
3	3
4	5
5	5
6	8
7	5
8	9
9	8
10	16
11	6
12	9
13	12
14	8
15	9
16	7
17	4
18	11
19	6
20	6
21	9
22	13
23	8
24	13
25	11
26	17
27	7
28	13
29	20
30	4
31	11
32	11
33	15
34	13
35	9
36	19
37	13
38	6
39	4
40	13
41	4
42	4
43	8
44	4
45	24
46	20

[1, 2, 3, 5, 5, 8, 5, 9, 8, 16, 6, 9, 12, 8, 9, 7, 4, 11, 6, 6, 9, 13, 8, 13, 11, 17, 7, 13, 20, 4, 11, 11, 15, 13, 9, 19, 13, 6, 4, 13, 4, 4, 8, 4, 24, 20]

cp's OEIS Frontend

A053148 When cototient function (A051953) is iterated with initial value A002110(n), a(n) = exponent of the largest power of 2 which appears in the iteration.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	5
6	8
7	5
8	9
9	8
10	16
11	6
12	9
13	12
14	8
15	9
16	7
17	4
18	11
19	6
20	6
21	9
22	13
23	8
24	13
25	11
26	17
27	7
28	13
29	20
30	4
31	11
32	11
33	15
34	13
35	9
36	19
37	13
38	6
39	4
40	13
41	4
42	4
43	8
44	4
45	24
46	20

n	a(n)
1	1
2	2
3	3
4	5
5	5
6	8
7	5
8	9
9	8
10	16
11	6
12	9
13	12
14	8
15	9
16	7
17	4
18	11
19	6
20	6
21	9
22	13
23	8
24	13
25	11
26	17
27	7
28	13
29	20
30	4
31	11
32	11
33	15
34	13
35	9
36	19
37	13
38	6
39	4
40	13
41	4
42	4
43	8
44	4
45	24
46	20

n	a(n)
1	1
2	2
3	3
4	5
5	5
6	8
7	5
8	9
9	8
10	16
11	6
12	9
13	12
14	8
15	9
16	7
17	4
18	11
19	6
20	6
21	9
22	13
23	8
24	13
25	11
26	17
27	7
28	13
29	20
30	4
31	11
32	11
33	15
34	13
35	9
36	19
37	13
38	6
39	4
40	13
41	4
42	4
43	8
44	4
45	24
46	20