A373060 - cp's OEIS frontend

A373060 a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} gcd(x_1, n)/gcd(x_1, x_2, x_3, n).

n	a(n)
1	1
2	11
3	43
4	115
5	221
6	473
7	631
8	1139
9	1609
10	2431
11	2531
12	4945
13	4213
14	6941
15	9503
16	10867
17	9521
18	17699
19	13339
20	25415
21	27133
22	27841
23	23783
24	48977
25	39721
26	46343
27	55555
28	72565
29	47909
30	104533
31	58591
32	100979
33	108833
34	104731
35	139451
36	185035
37	99901
38	146729
39	181159
40	251719

[1, 11, 43, 115, 221, 473, 631, 1139, 1609, 2431, 2531, 4945, 4213, 6941, 9503, 10867, 9521, 17699, 13339, 25415, 27133, 27841, 23783, 48977, 39721, 46343, 55555, 72565, 47909, 104533, 58591, 100979, 108833, 104731, 139451, 185035, 99901, 146729, 181159, 251719]

cp's OEIS Frontend

A373060 a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} gcd(x_1, n)/gcd(x_1, x_2, x_3, n).

Table of values

List of values