A175107 - cp's OEIS frontend

A175107 a(1)=1. For n >= 2, if A025474(n) is the exponent of the n-th prime-power (1 is considered the first prime-power here), then a(n) = the A025474(n)th integer from among those positive integers not yet in the sequence.

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	6
7	9
8	8
9	7
10	10
11	14
12	11
13	12
14	13
15	16
16	18
17	15
18	17
19	23
20	19
21	20
22	21
23	22
24	25
25	24
26	26
27	27
28	33
29	28
30	29
31	30
32	31
33	36
34	32
35	34
36	35
37	37
38	38
39	39
40	40
41	41
42	43
43	45
44	42
45	51
46	44
47	46
48	47
49	48
50	49
51	50
52	52
53	53
54	55
55	54
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	67
68	68
69	73
70	69
71	78
72	70

[1, 2, 3, 5, 4, 6, 9, 8, 7, 10, 14, 11, 12, 13, 16, 18, 15, 17, 23, 19, 20, 21, 22, 25, 24, 26, 27, 33, 28, 29, 30, 31, 36, 32, 34, 35, 37, 38, 39, 40, 41, 43, 45, 42, 51, 44, 46, 47, 48, 49, 50, 52, 53, 55, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 73, 69, 78, 70]

cp's OEIS Frontend

A175107 a(1)=1. For n >= 2, if A025474(n) is the exponent of the n-th prime-power (1 is considered the first prime-power here), then a(n) = the A025474(n)th integer from among those positive integers not yet in the sequence.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	6
7	9
8	8
9	7
10	10
11	14
12	11
13	12
14	13
15	16
16	18
17	15
18	17
19	23
20	19
21	20
22	21
23	22
24	25
25	24
26	26
27	27
28	33
29	28
30	29
31	30
32	31
33	36
34	32
35	34
36	35
37	37
38	38
39	39
40	40
41	41
42	43
43	45
44	42
45	51
46	44
47	46
48	47
49	48
50	49
51	50
52	52
53	53
54	55
55	54
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	67
68	68
69	73
70	69
71	78
72	70

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	6
7	9
8	8
9	7
10	10
11	14
12	11
13	12
14	13
15	16
16	18
17	15
18	17
19	23
20	19
21	20
22	21
23	22
24	25
25	24
26	26
27	27
28	33
29	28
30	29
31	30
32	31
33	36
34	32
35	34
36	35
37	37
38	38
39	39
40	40
41	41
42	43
43	45
44	42
45	51
46	44
47	46
48	47
49	48
50	49
51	50
52	52
53	53
54	55
55	54
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	67
68	68
69	73
70	69
71	78
72	70

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	6
7	9
8	8
9	7
10	10
11	14
12	11
13	12
14	13
15	16
16	18
17	15
18	17
19	23
20	19
21	20
22	21
23	22
24	25
25	24
26	26
27	27
28	33
29	28
30	29
31	30
32	31
33	36
34	32
35	34
36	35
37	37
38	38
39	39
40	40
41	41
42	43
43	45
44	42
45	51
46	44
47	46
48	47
49	48
50	49
51	50
52	52
53	53
54	55
55	54
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	67
68	68
69	73
70	69
71	78
72	70