A292127 - cp's OEIS frontend

A292127 a(1) = 1, a(r(n)^k) = 1 + k * a(n) where r(n) is the n-th number that is not a perfect power A007916(n).

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

[1, 2, 3, 3, 4, 4, 5, 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 7, 7, 8, 6, 7, 8, 8, 7, 9, 7, 7, 8, 9, 9, 6, 8, 10, 8, 7, 8, 9, 10, 10, 7, 9, 11, 9, 8, 9, 10, 11, 9, 11, 8, 10, 12, 10, 9, 10, 11, 12, 10, 12, 9, 11, 13, 7, 11, 10, 11, 12, 13, 11, 13, 10, 12, 14, 8, 12, 11]

cp's OEIS Frontend

A292127 a(1) = 1, a(r(n)^k) = 1 + k * a(n) where r(n) is the n-th number that is not a perfect power A007916(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	4
9	5
10	5
11	6
12	5
13	6
14	6
15	7
16	5
17	6
18	7
19	7
20	8
21	6
22	7
23	8
24	8
25	7
26	9
27	7
28	7
29	8
30	9
31	9
32	6
33	8
34	10
35	8
36	7
37	8
38	9
39	10
40	10
41	7
42	9
43	11
44	9
45	8
46	9
47	10
48	11
49	9
50	11
51	8
52	10
53	12
54	10
55	9
56	10
57	11
58	12
59	10
60	12
61	9
62	11
63	13
64	7
65	11
66	10
67	11
68	12
69	13
70	11
71	13
72	10
73	12
74	14
75	8
76	12
77	11

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

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