A072073 - cp's OEIS frontend

A072073 Number of solutions to cototient(x) = A051953(x) = 2^n.

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

[1, 2, 3, 3, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10]

cp's OEIS Frontend

A072073 Number of solutions to cototient(x) = A051953(x) = 2^n.

Table of values

List of values

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

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

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