A072292 - cp's OEIS frontend

A072292 Number of proper powers b^d <= n (b > 1, d > 1).

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

[0, 0, 0, 1, 1, 1, 1, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 8, 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, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11]

cp's OEIS Frontend

A072292 Number of proper powers b^d <= n (b > 1, d > 1).

Table of values

List of values

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

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

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