A308473 - cp's OEIS frontend

A308473 Sum of numbers < n which have common prime factors with n.

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	9
7	0
8	12
9	9
10	25
11	0
12	42
13	0
14	49
15	45
16	56
17	0
18	99
19	0
20	110
21	84
22	121
23	0
24	180
25	50
26	169
27	108
28	210
29	0
30	315
31	0
32	240
33	198
34	289
35	175
36	414
37	0
38	361
39	273
40	460
41	0
42	609
43	0
44	506
45	450
46	529
47	0
48	744
49	147
50	725
51	459
52	702
53	0
54	945
55	385
56	868
57	570
58	841
59	0
60	1290
61	0
62	961
63	819
64	992
65	520

[0, 0, 0, 2, 0, 9, 0, 12, 9, 25, 0, 42, 0, 49, 45, 56, 0, 99, 0, 110, 84, 121, 0, 180, 50, 169, 108, 210, 0, 315, 0, 240, 198, 289, 175, 414, 0, 361, 273, 460, 0, 609, 0, 506, 450, 529, 0, 744, 147, 725, 459, 702, 0, 945, 385, 868, 570, 841, 0, 1290, 0, 961, 819, 992, 520]

cp's OEIS Frontend

A308473 Sum of numbers < n which have common prime factors with n.

Table of values

List of values