A338913 - cp's OEIS frontend

A338913 Greater prime index of the n-th semiprime.

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

[1, 2, 2, 3, 4, 3, 4, 5, 3, 6, 5, 7, 4, 8, 6, 9, 4, 7, 5, 8, 10, 11, 6, 9, 12, 5, 13, 7, 14, 10, 6, 11, 15, 8, 16, 12, 9, 17, 7, 5, 18, 13, 14, 8, 19, 15, 20, 6, 10, 21, 11, 22, 16, 9, 23, 6, 17, 24, 18, 12, 7, 25, 19, 26, 10, 13, 27, 8, 20, 28, 14, 11, 29, 21]

cp's OEIS Frontend

A338913 Greater prime index of the n-th semiprime.

Table of values

List of values

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

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

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