A070296 - cp's OEIS frontend

A070296 Let sphi(k) = number of primes less than k and coprime to it (A048865); then a(n) = number of integers m with sphi(m) = n.

n	a(n)
0	2
1	3
2	2
3	4
4	3
5	3
6	4
7	5
8	3
9	5
10	6
11	1
12	4
13	5
14	8
15	2
16	5
17	4
18	3
19	5
20	4
21	7
22	7
23	5
24	2
25	3
26	3
27	6
28	10
29	5
30	7
31	2
32	10
33	3
34	4
35	7
36	5
37	4
38	7
39	4
40	7
41	3
42	5
43	2
44	12
45	10
46	5
47	3
48	4
49	5
50	2
51	10
52	6
53	7
54	5
55	3
56	5
57	4
58	4
59	9
60	14
61	3
62	3
63	5
64	12
65	8
66	7
67	3
68	5
69	7
70	6
71	7
72	5
73	5
74	6
75	7
76	6
77	9
78	7
79	4
80	7
81	5
82	5
83	3
84	8
85	7
86	3
87	2
88	7
89	10
90	7
91	7
92	4
93	7
94	7

[2, 3, 2, 4, 3, 3, 4, 5, 3, 5, 6, 1, 4, 5, 8, 2, 5, 4, 3, 5, 4, 7, 7, 5, 2, 3, 3, 6, 10, 5, 7, 2, 10, 3, 4, 7, 5, 4, 7, 4, 7, 3, 5, 2, 12, 10, 5, 3, 4, 5, 2, 10, 6, 7, 5, 3, 5, 4, 4, 9, 14, 3, 3, 5, 12, 8, 7, 3, 5, 7, 6, 7, 5, 5, 6, 7, 6, 9, 7, 4, 7, 5, 5, 3, 8, 7, 3, 2, 7, 10, 7, 7, 4, 7, 7]

cp's OEIS Frontend

A070296 Let sphi(k) = number of primes less than k and coprime to it (A048865); then a(n) = number of integers m with sphi(m) = n.

Table of values

List of values

n	a(n)
0	2
1	3
2	2
3	4
4	3
5	3
6	4
7	5
8	3
9	5
10	6
11	1
12	4
13	5
14	8
15	2
16	5
17	4
18	3
19	5
20	4
21	7
22	7
23	5
24	2
25	3
26	3
27	6
28	10
29	5
30	7
31	2
32	10
33	3
34	4
35	7
36	5
37	4
38	7
39	4
40	7
41	3
42	5
43	2
44	12
45	10
46	5
47	3
48	4
49	5
50	2
51	10
52	6
53	7
54	5
55	3
56	5
57	4
58	4
59	9
60	14
61	3
62	3
63	5
64	12
65	8
66	7
67	3
68	5
69	7
70	6
71	7
72	5
73	5
74	6
75	7
76	6
77	9
78	7
79	4
80	7
81	5
82	5
83	3
84	8
85	7
86	3
87	2
88	7
89	10
90	7
91	7
92	4
93	7
94	7

n	a(n)
0	2
1	3
2	2
3	4
4	3
5	3
6	4
7	5
8	3
9	5
10	6
11	1
12	4
13	5
14	8
15	2
16	5
17	4
18	3
19	5
20	4
21	7
22	7
23	5
24	2
25	3
26	3
27	6
28	10
29	5
30	7
31	2
32	10
33	3
34	4
35	7
36	5
37	4
38	7
39	4
40	7
41	3
42	5
43	2
44	12
45	10
46	5
47	3
48	4
49	5
50	2
51	10
52	6
53	7
54	5
55	3
56	5
57	4
58	4
59	9
60	14
61	3
62	3
63	5
64	12
65	8
66	7
67	3
68	5
69	7
70	6
71	7
72	5
73	5
74	6
75	7
76	6
77	9
78	7
79	4
80	7
81	5
82	5
83	3
84	8
85	7
86	3
87	2
88	7
89	10
90	7
91	7
92	4
93	7
94	7

n	a(n)
0	2
1	3
2	2
3	4
4	3
5	3
6	4
7	5
8	3
9	5
10	6
11	1
12	4
13	5
14	8
15	2
16	5
17	4
18	3
19	5
20	4
21	7
22	7
23	5
24	2
25	3
26	3
27	6
28	10
29	5
30	7
31	2
32	10
33	3
34	4
35	7
36	5
37	4
38	7
39	4
40	7
41	3
42	5
43	2
44	12
45	10
46	5
47	3
48	4
49	5
50	2
51	10
52	6
53	7
54	5
55	3
56	5
57	4
58	4
59	9
60	14
61	3
62	3
63	5
64	12
65	8
66	7
67	3
68	5
69	7
70	6
71	7
72	5
73	5
74	6
75	7
76	6
77	9
78	7
79	4
80	7
81	5
82	5
83	3
84	8
85	7
86	3
87	2
88	7
89	10
90	7
91	7
92	4
93	7
94	7