A369745 - cp's OEIS frontend

A369745 a(n) = Sum_{p|n, p prime} p * pi(n/p).

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

[0, 0, 0, 2, 0, 7, 0, 4, 6, 11, 0, 12, 0, 15, 19, 8, 0, 17, 0, 18, 26, 21, 0, 22, 15, 25, 12, 26, 0, 39, 0, 12, 37, 31, 41, 29, 0, 35, 44, 36, 0, 55, 0, 38, 38, 41, 0, 36, 28, 38, 55, 44, 0, 39, 58, 46, 62, 49, 0, 69, 0, 53, 52, 22, 69, 79, 0, 56, 73, 80, 0, 49, 0, 61]

cp's OEIS Frontend

A369745 a(n) = Sum_{p|n, p prime} p * pi(n/p).

Table of values

List of values

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

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

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