A372926 - cp's OEIS frontend

A372926 a(n) = Sum_{1 <= x_1, x_2 <= n} gcd(x_1, x_2, n)^4.

n	a(n)
1	1
2	19
3	89
4	316
5	649
6	1691
7	2449
8	5104
9	7281
10	12331
11	14761
12	28124
13	28729
14	46531
15	57761
16	81856
17	83809
18	138339
19	130681
20	205084
21	217961
22	280459
23	280369
24	454256
25	406225
26	545851
27	590409
28	773884
29	708121
30	1097459
31	924481
32	1310464
33	1313729
34	1592371
35	1589401
36	2300796

[1, 19, 89, 316, 649, 1691, 2449, 5104, 7281, 12331, 14761, 28124, 28729, 46531, 57761, 81856, 83809, 138339, 130681, 205084, 217961, 280459, 280369, 454256, 406225, 545851, 590409, 773884, 708121, 1097459, 924481, 1310464, 1313729, 1592371, 1589401, 2300796]

cp's OEIS Frontend

A372926 a(n) = Sum_{1 <= x_1, x_2 <= n} gcd(x_1, x_2, n)^4.

Table of values

List of values