A138752 - cp's OEIS frontend

A138752 Number of iterations before prime(n) reaches 7 or 2 under x -> A007918(A138750(x)).

n	a(n)
1	0
2	1
3	2
4	0
5	1
6	4
7	2
8	7
9	5
10	3
11	20
12	16
13	6
14	6
15	4
16	4
17	21
18	23
19	19
20	17
21	17
22	15
23	7
24	5
25	7
26	5
27	28
28	22
29	26
30	22
31	22
32	20
33	18
34	18
35	16
36	20
37	16
38	14
39	6
40	6
41	8
42	59
43	8
44	8
45	6
46	29
47	27
48	25
49	23
50	25
51	23
52	23
53	27
54	23
55	21
56	19
57	19
58	21
59	19
60	17
61	19
62	17
63	19
64	17
65	17
66	15
67	13
68	11
69	9
70	11
71	9
72	60
73	58
74	54
75	11
76	9
77	7
78	30
79	28

[0, 1, 2, 0, 1, 4, 2, 7, 5, 3, 20, 16, 6, 6, 4, 4, 21, 23, 19, 17, 17, 15, 7, 5, 7, 5, 28, 22, 26, 22, 22, 20, 18, 18, 16, 20, 16, 14, 6, 6, 8, 59, 8, 8, 6, 29, 27, 25, 23, 25, 23, 23, 27, 23, 21, 19, 19, 21, 19, 17, 19, 17, 19, 17, 17, 15, 13, 11, 9, 11, 9, 60, 58, 54, 11, 9, 7, 30, 28]

cp's OEIS Frontend

A138752 Number of iterations before prime(n) reaches 7 or 2 under x -> A007918(A138750(x)).

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	0
5	1
6	4
7	2
8	7
9	5
10	3
11	20
12	16
13	6
14	6
15	4
16	4
17	21
18	23
19	19
20	17
21	17
22	15
23	7
24	5
25	7
26	5
27	28
28	22
29	26
30	22
31	22
32	20
33	18
34	18
35	16
36	20
37	16
38	14
39	6
40	6
41	8
42	59
43	8
44	8
45	6
46	29
47	27
48	25
49	23
50	25
51	23
52	23
53	27
54	23
55	21
56	19
57	19
58	21
59	19
60	17
61	19
62	17
63	19
64	17
65	17
66	15
67	13
68	11
69	9
70	11
71	9
72	60
73	58
74	54
75	11
76	9
77	7
78	30
79	28

n	a(n)
1	0
2	1
3	2
4	0
5	1
6	4
7	2
8	7
9	5
10	3
11	20
12	16
13	6
14	6
15	4
16	4
17	21
18	23
19	19
20	17
21	17
22	15
23	7
24	5
25	7
26	5
27	28
28	22
29	26
30	22
31	22
32	20
33	18
34	18
35	16
36	20
37	16
38	14
39	6
40	6
41	8
42	59
43	8
44	8
45	6
46	29
47	27
48	25
49	23
50	25
51	23
52	23
53	27
54	23
55	21
56	19
57	19
58	21
59	19
60	17
61	19
62	17
63	19
64	17
65	17
66	15
67	13
68	11
69	9
70	11
71	9
72	60
73	58
74	54
75	11
76	9
77	7
78	30
79	28

n	a(n)
1	0
2	1
3	2
4	0
5	1
6	4
7	2
8	7
9	5
10	3
11	20
12	16
13	6
14	6
15	4
16	4
17	21
18	23
19	19
20	17
21	17
22	15
23	7
24	5
25	7
26	5
27	28
28	22
29	26
30	22
31	22
32	20
33	18
34	18
35	16
36	20
37	16
38	14
39	6
40	6
41	8
42	59
43	8
44	8
45	6
46	29
47	27
48	25
49	23
50	25
51	23
52	23
53	27
54	23
55	21
56	19
57	19
58	21
59	19
60	17
61	19
62	17
63	19
64	17
65	17
66	15
67	13
68	11
69	9
70	11
71	9
72	60
73	58
74	54
75	11
76	9
77	7
78	30
79	28