A176506 - cp's OEIS frontend

A176506 Difference between the prime indices of the two factors of the n-th semiprime.

n	a(n)
1	0
2	1
3	0
4	2
5	3
6	1
7	2
8	4
9	0
10	5
11	3
12	6
13	1
14	7
15	4
16	8
17	0
18	5
19	2
20	6
21	9
22	10
23	3
24	7
25	11
26	1
27	12
28	4
29	13
30	8
31	2
32	9
33	14
34	5
35	15
36	10
37	6
38	16
39	3
40	0
41	17
42	11
43	12
44	4
45	18
46	13
47	19
48	1
49	7
50	20
51	8
52	21
53	14
54	5
55	22
56	0
57	15
58	23
59	16
60	9
61	2
62	24
63	17
64	25
65	6
66	10
67	26
68	3
69	18
70	27
71	11
72	7
73	28
74	19
75	1
76	29
77	12
78	20
79	2
80	21
81	4
82	30
83	8
84	31
85	13
86	22

[0, 1, 0, 2, 3, 1, 2, 4, 0, 5, 3, 6, 1, 7, 4, 8, 0, 5, 2, 6, 9, 10, 3, 7, 11, 1, 12, 4, 13, 8, 2, 9, 14, 5, 15, 10, 6, 16, 3, 0, 17, 11, 12, 4, 18, 13, 19, 1, 7, 20, 8, 21, 14, 5, 22, 0, 15, 23, 16, 9, 2, 24, 17, 25, 6, 10, 26, 3, 18, 27, 11, 7, 28, 19, 1, 29, 12, 20, 2, 21, 4, 30, 8, 31, 13, 22]

cp's OEIS Frontend

A176506 Difference between the prime indices of the two factors of the n-th semiprime.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	2
5	3
6	1
7	2
8	4
9	0
10	5
11	3
12	6
13	1
14	7
15	4
16	8
17	0
18	5
19	2
20	6
21	9
22	10
23	3
24	7
25	11
26	1
27	12
28	4
29	13
30	8
31	2
32	9
33	14
34	5
35	15
36	10
37	6
38	16
39	3
40	0
41	17
42	11
43	12
44	4
45	18
46	13
47	19
48	1
49	7
50	20
51	8
52	21
53	14
54	5
55	22
56	0
57	15
58	23
59	16
60	9
61	2
62	24
63	17
64	25
65	6
66	10
67	26
68	3
69	18
70	27
71	11
72	7
73	28
74	19
75	1
76	29
77	12
78	20
79	2
80	21
81	4
82	30
83	8
84	31
85	13
86	22

n	a(n)
1	0
2	1
3	0
4	2
5	3
6	1
7	2
8	4
9	0
10	5
11	3
12	6
13	1
14	7
15	4
16	8
17	0
18	5
19	2
20	6
21	9
22	10
23	3
24	7
25	11
26	1
27	12
28	4
29	13
30	8
31	2
32	9
33	14
34	5
35	15
36	10
37	6
38	16
39	3
40	0
41	17
42	11
43	12
44	4
45	18
46	13
47	19
48	1
49	7
50	20
51	8
52	21
53	14
54	5
55	22
56	0
57	15
58	23
59	16
60	9
61	2
62	24
63	17
64	25
65	6
66	10
67	26
68	3
69	18
70	27
71	11
72	7
73	28
74	19
75	1
76	29
77	12
78	20
79	2
80	21
81	4
82	30
83	8
84	31
85	13
86	22

n	a(n)
1	0
2	1
3	0
4	2
5	3
6	1
7	2
8	4
9	0
10	5
11	3
12	6
13	1
14	7
15	4
16	8
17	0
18	5
19	2
20	6
21	9
22	10
23	3
24	7
25	11
26	1
27	12
28	4
29	13
30	8
31	2
32	9
33	14
34	5
35	15
36	10
37	6
38	16
39	3
40	0
41	17
42	11
43	12
44	4
45	18
46	13
47	19
48	1
49	7
50	20
51	8
52	21
53	14
54	5
55	22
56	0
57	15
58	23
59	16
60	9
61	2
62	24
63	17
64	25
65	6
66	10
67	26
68	3
69	18
70	27
71	11
72	7
73	28
74	19
75	1
76	29
77	12
78	20
79	2
80	21
81	4
82	30
83	8
84	31
85	13
86	22