A369909 - cp's OEIS frontend

A369909 a(n) = n * Sum_{p|n, p prime} Omega(n/p) / p.

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	8
9	3
10	7
11	0
12	20
13	0
14	9
15	8
16	24
17	0
18	30
19	0
20	28
21	10
22	13
23	0
24	60
25	5
26	15
27	18
28	36
29	0
30	62
31	0
32	64
33	14
34	19
35	12
36	90
37	0
38	21
39	16
40	84
41	0
42	82
43	0
44	52
45	48
46	25
47	0
48	160
49	7
50	70
51	20
52	60
53	0
54	135
55	16
56	108
57	22
58	31
59	0
60	186
61	0
62	33
63	60
64	160
65	18
66	122
67	0
68	76
69	26
70	118
71	0
72	240
73	0

[0, 0, 0, 2, 0, 5, 0, 8, 3, 7, 0, 20, 0, 9, 8, 24, 0, 30, 0, 28, 10, 13, 0, 60, 5, 15, 18, 36, 0, 62, 0, 64, 14, 19, 12, 90, 0, 21, 16, 84, 0, 82, 0, 52, 48, 25, 0, 160, 7, 70, 20, 60, 0, 135, 16, 108, 22, 31, 0, 186, 0, 33, 60, 160, 18, 122, 0, 76, 26, 118, 0, 240, 0]

cp's OEIS Frontend

A369909 a(n) = n * Sum_{p|n, p prime} Omega(n/p) / p.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	8
9	3
10	7
11	0
12	20
13	0
14	9
15	8
16	24
17	0
18	30
19	0
20	28
21	10
22	13
23	0
24	60
25	5
26	15
27	18
28	36
29	0
30	62
31	0
32	64
33	14
34	19
35	12
36	90
37	0
38	21
39	16
40	84
41	0
42	82
43	0
44	52
45	48
46	25
47	0
48	160
49	7
50	70
51	20
52	60
53	0
54	135
55	16
56	108
57	22
58	31
59	0
60	186
61	0
62	33
63	60
64	160
65	18
66	122
67	0
68	76
69	26
70	118
71	0
72	240
73	0

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	8
9	3
10	7
11	0
12	20
13	0
14	9
15	8
16	24
17	0
18	30
19	0
20	28
21	10
22	13
23	0
24	60
25	5
26	15
27	18
28	36
29	0
30	62
31	0
32	64
33	14
34	19
35	12
36	90
37	0
38	21
39	16
40	84
41	0
42	82
43	0
44	52
45	48
46	25
47	0
48	160
49	7
50	70
51	20
52	60
53	0
54	135
55	16
56	108
57	22
58	31
59	0
60	186
61	0
62	33
63	60
64	160
65	18
66	122
67	0
68	76
69	26
70	118
71	0
72	240
73	0

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	8
9	3
10	7
11	0
12	20
13	0
14	9
15	8
16	24
17	0
18	30
19	0
20	28
21	10
22	13
23	0
24	60
25	5
26	15
27	18
28	36
29	0
30	62
31	0
32	64
33	14
34	19
35	12
36	90
37	0
38	21
39	16
40	84
41	0
42	82
43	0
44	52
45	48
46	25
47	0
48	160
49	7
50	70
51	20
52	60
53	0
54	135
55	16
56	108
57	22
58	31
59	0
60	186
61	0
62	33
63	60
64	160
65	18
66	122
67	0
68	76
69	26
70	118
71	0
72	240
73	0