A072006 - cp's OEIS frontend

A072006 Number of terms in InversePhi set of prime(n)*(prime(n)-1) = phi(p(n)^2), where prime(n) is the n-th prime and phi=A000010.

n	a(n)
1	3
2	4
3	5
4	4
5	2
6	7
7	5
8	2
9	2
10	2
11	2
12	6
13	10
14	2
15	2
16	2
17	2
18	7
19	4
20	2
21	16
22	4
23	2
24	8
25	19
26	5
27	2
28	2
29	2
30	13
31	2
32	2
33	2
34	4
35	5
36	4
37	2
38	4
39	2
40	5
41	2
42	14
43	2
44	21
45	2
46	2
47	2
48	2
49	2
50	5
51	5
52	2
53	28
54	2
55	2
56	2
57	2
58	2
59	8
60	8
61	2
62	2
63	2
64	2
65	4
66	5
67	2
68	14
69	2
70	7
71	5
72	2
73	2
74	5
75	4
76	2
77	2
78	11
79	7
80	17
81	2
82	11
83	2
84	26
85	2
86	2
87	12
88	4
89	5
90	2
91	2
92	2
93	2
94	2
95	2
96	2
97	5
98	5

[3, 4, 5, 4, 2, 7, 5, 2, 2, 2, 2, 6, 10, 2, 2, 2, 2, 7, 4, 2, 16, 4, 2, 8, 19, 5, 2, 2, 2, 13, 2, 2, 2, 4, 5, 4, 2, 4, 2, 5, 2, 14, 2, 21, 2, 2, 2, 2, 2, 5, 5, 2, 28, 2, 2, 2, 2, 2, 8, 8, 2, 2, 2, 2, 4, 5, 2, 14, 2, 7, 5, 2, 2, 5, 4, 2, 2, 11, 7, 17, 2, 11, 2, 26, 2, 2, 12, 4, 5, 2, 2, 2, 2, 2, 2, 2, 5, 5]

cp's OEIS Frontend

A072006 Number of terms in InversePhi set of prime(n)*(prime(n)-1) = phi(p(n)^2), where prime(n) is the n-th prime and phi=A000010.

Table of values

List of values

n	a(n)
1	3
2	4
3	5
4	4
5	2
6	7
7	5
8	2
9	2
10	2
11	2
12	6
13	10
14	2
15	2
16	2
17	2
18	7
19	4
20	2
21	16
22	4
23	2
24	8
25	19
26	5
27	2
28	2
29	2
30	13
31	2
32	2
33	2
34	4
35	5
36	4
37	2
38	4
39	2
40	5
41	2
42	14
43	2
44	21
45	2
46	2
47	2
48	2
49	2
50	5
51	5
52	2
53	28
54	2
55	2
56	2
57	2
58	2
59	8
60	8
61	2
62	2
63	2
64	2
65	4
66	5
67	2
68	14
69	2
70	7
71	5
72	2
73	2
74	5
75	4
76	2
77	2
78	11
79	7
80	17
81	2
82	11
83	2
84	26
85	2
86	2
87	12
88	4
89	5
90	2
91	2
92	2
93	2
94	2
95	2
96	2
97	5
98	5

n	a(n)
1	3
2	4
3	5
4	4
5	2
6	7
7	5
8	2
9	2
10	2
11	2
12	6
13	10
14	2
15	2
16	2
17	2
18	7
19	4
20	2
21	16
22	4
23	2
24	8
25	19
26	5
27	2
28	2
29	2
30	13
31	2
32	2
33	2
34	4
35	5
36	4
37	2
38	4
39	2
40	5
41	2
42	14
43	2
44	21
45	2
46	2
47	2
48	2
49	2
50	5
51	5
52	2
53	28
54	2
55	2
56	2
57	2
58	2
59	8
60	8
61	2
62	2
63	2
64	2
65	4
66	5
67	2
68	14
69	2
70	7
71	5
72	2
73	2
74	5
75	4
76	2
77	2
78	11
79	7
80	17
81	2
82	11
83	2
84	26
85	2
86	2
87	12
88	4
89	5
90	2
91	2
92	2
93	2
94	2
95	2
96	2
97	5
98	5

n	a(n)
1	3
2	4
3	5
4	4
5	2
6	7
7	5
8	2
9	2
10	2
11	2
12	6
13	10
14	2
15	2
16	2
17	2
18	7
19	4
20	2
21	16
22	4
23	2
24	8
25	19
26	5
27	2
28	2
29	2
30	13
31	2
32	2
33	2
34	4
35	5
36	4
37	2
38	4
39	2
40	5
41	2
42	14
43	2
44	21
45	2
46	2
47	2
48	2
49	2
50	5
51	5
52	2
53	28
54	2
55	2
56	2
57	2
58	2
59	8
60	8
61	2
62	2
63	2
64	2
65	4
66	5
67	2
68	14
69	2
70	7
71	5
72	2
73	2
74	5
75	4
76	2
77	2
78	11
79	7
80	17
81	2
82	11
83	2
84	26
85	2
86	2
87	12
88	4
89	5
90	2
91	2
92	2
93	2
94	2
95	2
96	2
97	5
98	5