A381641 - cp's OEIS frontend

A381641 Numerators of Sum_{i=1..omega(n)-1} (1 - p_{i}/p_{i+1}), where omega(n) = A001221(n) and p_1 < p_2 < ... p_omega(n) are the distinct prime factors of n; a(1) = 0.

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

[0, 0, 0, 0, 0, 1, 0, 0, 0, 3, 0, 1, 0, 5, 2, 0, 0, 1, 0, 3, 4, 9, 0, 1, 0, 11, 0, 5, 0, 11, 0, 0, 8, 15, 2, 1, 0, 17, 10, 3, 0, 19, 0, 9, 2, 21, 0, 1, 0, 3, 14, 11, 0, 1, 6, 5, 16, 27, 0, 11, 0, 29, 4, 0, 8, 35, 0, 15, 20, 31, 0, 1, 0, 35, 2, 17, 4, 43, 0, 3, 0]

cp's OEIS Frontend

A381641 Numerators of Sum_{i=1..omega(n)-1} (1 - p_{i}/p_{i+1}), where omega(n) = A001221(n) and p_1 < p_2 < ... p_omega(n) are the distinct prime factors of n; a(1) = 0.

Table of values

List of values

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

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

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