A304492 - cp's OEIS frontend

A304492 Position in the sequence of numbers that are not perfect powers (A007916) of the last or deepest exponent in the power-tower for n.

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

[1, 2, 3, 2, 4, 5, 6, 3, 2, 7, 8, 9, 10, 11, 12, 2, 13, 14, 15, 16, 17, 18, 19, 20, 2, 21, 3, 22, 23, 24, 25, 4, 26, 27, 28, 2, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 2, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 5, 55, 56, 57, 58, 59, 60]

cp's OEIS Frontend

A304492 Position in the sequence of numbers that are not perfect powers (A007916) of the last or deepest exponent in the power-tower for n.

Table of values

List of values

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

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

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