A381497 - cp's OEIS frontend

A381497 a(n) = sum of numbers k < n such that 1 < gcd(k,n) and rad(k) != rad(n), where rad = A007947.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	9
7	0
8	6
9	6
10	25
11	0
12	36
13	0
14	49
15	45
16	42
17	0
18	81
19	0
20	100
21	84
22	121
23	0
24	144
25	45
26	169
27	96
28	196
29	0
30	315
31	0
32	210
33	198
34	289
35	175
36	354
37	0
38	361
39	273
40	430
41	0
42	609
43	0
44	484
45	435
46	529
47	0
48	648
49	140
50	655
51	459
52	676
53	0
54	801
55	385
56	826
57	570
58	841
59	0
60	1260
61	0
62	961
63	798

[0, 0, 0, 0, 0, 9, 0, 6, 6, 25, 0, 36, 0, 49, 45, 42, 0, 81, 0, 100, 84, 121, 0, 144, 45, 169, 96, 196, 0, 315, 0, 210, 198, 289, 175, 354, 0, 361, 273, 430, 0, 609, 0, 484, 435, 529, 0, 648, 140, 655, 459, 676, 0, 801, 385, 826, 570, 841, 0, 1260, 0, 961, 798]

cp's OEIS Frontend

A381497 a(n) = sum of numbers k < n such that 1 < gcd(k,n) and rad(k) != rad(n), where rad = A007947.

Table of values

List of values