A165634 - cp's OEIS frontend

A165634 Start with x=1 and repeat: if x is a prime number then (append i and then x, with x=prime(i)) else (only append x), continue with x:=x+1.

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

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

cp's OEIS Frontend

A165634 Start with x=1 and repeat: if x is a prime number then (append i and then x, with x=prime(i)) else (only append x), continue with x:=x+1.

Table of values

List of values

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

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

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