A373059 - cp's OEIS frontend

A373059 a(n) = Sum_{1 <= x_1, x_2 <= n} gcd(x_1, n)/gcd(x_1, x_2, n).

n	a(n)
1	1
2	5
3	13
4	25
5	41
6	65
7	85
8	121
9	157
10	205
11	221
12	325
13	313
14	425
15	533
16	569
17	545
18	785
19	685
20	1025
21	1105
22	1105
23	1013
24	1573
25	1441
26	1565
27	1777
28	2125
29	1625
30	2665
31	1861
32	2617
33	2873
34	2725
35	3485
36	3925
37	2665
38	3425
39	4069
40	4961
41	3281
42	5525
43	3613
44	5525
45	6437
46	5065
47	4325
48	7397
49	5965

[1, 5, 13, 25, 41, 65, 85, 121, 157, 205, 221, 325, 313, 425, 533, 569, 545, 785, 685, 1025, 1105, 1105, 1013, 1573, 1441, 1565, 1777, 2125, 1625, 2665, 1861, 2617, 2873, 2725, 3485, 3925, 2665, 3425, 4069, 4961, 3281, 5525, 3613, 5525, 6437, 5065, 4325, 7397, 5965]

cp's OEIS Frontend

A373059 a(n) = Sum_{1 <= x_1, x_2 <= n} gcd(x_1, n)/gcd(x_1, x_2, n).

Table of values

List of values