A118657 - cp's OEIS frontend

A118657 a(n) = Sum_[k unrelated to n and k a(k) = Sum_[k < n such that GCD(k,n) != 1 and k does not divide n ] a(k); a(1) = a(2) = a(3) = a(4) = 1.

n	a(n)
1	1
2	1
3	1
4	1
5	0
6	1
7	0
8	1
9	1
10	3
11	0
12	5
13	0
14	11
15	10
16	20
17	0
18	51
19	0
20	99
21	79
22	192
23	0
24	466
25	112
26	850
27	612
28	1767
29	0
30	4267
31	0
32	7712
33	5684
34	15446
35	6348
36	37219
37	0
38	68111
39	49245
40	142588
41	0
42	340698
43	0
44	624999
45	587477
46	1244507
47	0
48	3131628
49	348903
50	6214474
51	4172889
52	11883510
53	0
54	28533958
55	7586253
56	52606134
57	36932401
58	104858718
59	0
60	259054161

[1, 1, 1, 1, 0, 1, 0, 1, 1, 3, 0, 5, 0, 11, 10, 20, 0, 51, 0, 99, 79, 192, 0, 466, 112, 850, 612, 1767, 0, 4267, 0, 7712, 5684, 15446, 6348, 37219, 0, 68111, 49245, 142588, 0, 340698, 0, 624999, 587477, 1244507, 0, 3131628, 348903, 6214474, 4172889, 11883510, 0, 28533958, 7586253, 52606134, 36932401, 104858718, 0, 259054161]

cp's OEIS Frontend

A118657 a(n) = Sum_[k unrelated to n and k a(k) = Sum_[k < n such that GCD(k,n) != 1 and k does not divide n ] a(k); a(1) = a(2) = a(3) = a(4) = 1.

Table of values

List of values