A373129 - cp's OEIS frontend

A373129 a(n) = Sum_{1 <= x_1, x_2 <= n} sigma( n/gcd(x_1, x_2, n) ).

n	a(n)
1	1
2	10
3	33
4	94
5	145
6	330
7	385
8	814
9	969
10	1450
11	1441
12	3102
13	2353
14	3850
15	4785
16	6766
17	5185
18	9690
19	7201
20	13630
21	12705
22	14410
23	12673
24	26862
25	18745
26	23530
27	26889
28	36190
29	25201
30	47850
31	30721
32	55150
33	47553
34	51850
35	55825
36	91086
37	51985
38	72010
39	77649
40	118030
41	70561
42	127050

[1, 10, 33, 94, 145, 330, 385, 814, 969, 1450, 1441, 3102, 2353, 3850, 4785, 6766, 5185, 9690, 7201, 13630, 12705, 14410, 12673, 26862, 18745, 23530, 26889, 36190, 25201, 47850, 30721, 55150, 47553, 51850, 55825, 91086, 51985, 72010, 77649, 118030, 70561, 127050]

cp's OEIS Frontend

A373129 a(n) = Sum_{1 <= x_1, x_2 <= n} sigma( n/gcd(x_1, x_2, n) ).

Table of values

List of values