A032446 - cp's OEIS frontend

A032446 Number of solutions to phi(k) = 2n.

n	a(n)
1	3
2	4
3	4
4	5
5	2
6	6
7	0
8	6
9	4
10	5
11	2
12	10
13	0
14	2
15	2
16	7
17	0
18	8
19	0
20	9
21	4
22	3
23	2
24	11
25	0
26	2
27	2
28	3
29	2
30	9
31	0
32	8
33	2
34	0
35	2
36	17
37	0
38	0
39	2
40	10
41	2
42	6
43	0
44	6
45	0
46	3
47	0
48	17
49	0
50	4
51	2
52	3
53	2
54	9
55	2
56	6
57	0
58	3
59	0
60	17
61	0
62	0
63	2
64	9
65	2
66	7
67	0
68	2
69	2
70	3
71	0
72	21
73	0
74	2
75	2
76	0
77	0
78	7
79	0
80	12
81	4
82	3
83	2
84	12
85	0
86	2
87	0
88	8
89	2
90	10

[3, 4, 4, 5, 2, 6, 0, 6, 4, 5, 2, 10, 0, 2, 2, 7, 0, 8, 0, 9, 4, 3, 2, 11, 0, 2, 2, 3, 2, 9, 0, 8, 2, 0, 2, 17, 0, 0, 2, 10, 2, 6, 0, 6, 0, 3, 0, 17, 0, 4, 2, 3, 2, 9, 2, 6, 0, 3, 0, 17, 0, 0, 2, 9, 2, 7, 0, 2, 2, 3, 0, 21, 0, 2, 2, 0, 0, 7, 0, 12, 4, 3, 2, 12, 0, 2, 0, 8, 2, 10]

cp's OEIS Frontend

A032446 Number of solutions to phi(k) = 2n.

Table of values

List of values

n	a(n)
1	3
2	4
3	4
4	5
5	2
6	6
7	0
8	6
9	4
10	5
11	2
12	10
13	0
14	2
15	2
16	7
17	0
18	8
19	0
20	9
21	4
22	3
23	2
24	11
25	0
26	2
27	2
28	3
29	2
30	9
31	0
32	8
33	2
34	0
35	2
36	17
37	0
38	0
39	2
40	10
41	2
42	6
43	0
44	6
45	0
46	3
47	0
48	17
49	0
50	4
51	2
52	3
53	2
54	9
55	2
56	6
57	0
58	3
59	0
60	17
61	0
62	0
63	2
64	9
65	2
66	7
67	0
68	2
69	2
70	3
71	0
72	21
73	0
74	2
75	2
76	0
77	0
78	7
79	0
80	12
81	4
82	3
83	2
84	12
85	0
86	2
87	0
88	8
89	2
90	10

n	a(n)
1	3
2	4
3	4
4	5
5	2
6	6
7	0
8	6
9	4
10	5
11	2
12	10
13	0
14	2
15	2
16	7
17	0
18	8
19	0
20	9
21	4
22	3
23	2
24	11
25	0
26	2
27	2
28	3
29	2
30	9
31	0
32	8
33	2
34	0
35	2
36	17
37	0
38	0
39	2
40	10
41	2
42	6
43	0
44	6
45	0
46	3
47	0
48	17
49	0
50	4
51	2
52	3
53	2
54	9
55	2
56	6
57	0
58	3
59	0
60	17
61	0
62	0
63	2
64	9
65	2
66	7
67	0
68	2
69	2
70	3
71	0
72	21
73	0
74	2
75	2
76	0
77	0
78	7
79	0
80	12
81	4
82	3
83	2
84	12
85	0
86	2
87	0
88	8
89	2
90	10

n	a(n)
1	3
2	4
3	4
4	5
5	2
6	6
7	0
8	6
9	4
10	5
11	2
12	10
13	0
14	2
15	2
16	7
17	0
18	8
19	0
20	9
21	4
22	3
23	2
24	11
25	0
26	2
27	2
28	3
29	2
30	9
31	0
32	8
33	2
34	0
35	2
36	17
37	0
38	0
39	2
40	10
41	2
42	6
43	0
44	6
45	0
46	3
47	0
48	17
49	0
50	4
51	2
52	3
53	2
54	9
55	2
56	6
57	0
58	3
59	0
60	17
61	0
62	0
63	2
64	9
65	2
66	7
67	0
68	2
69	2
70	3
71	0
72	21
73	0
74	2
75	2
76	0
77	0
78	7
79	0
80	12
81	4
82	3
83	2
84	12
85	0
86	2
87	0
88	8
89	2
90	10