A372937 - cp's OEIS frontend

A372937 a(n) = Sum_{1 <= x_1, x_2, x_3, x_4 <= n} gcd(x_1, x_2, x_3, x_4, n)^5.

n	a(n)
1	1
2	47
3	323
4	1744
5	3749
6	15181
7	19207
8	59648
9	84969
10	176203
11	175691
12	563312
13	399853
14	902729
15	1210927
16	1970176
17	1503377
18	3993543
19	2606419
20	6538256
21	6203861
22	8257477
23	6716183
24	19266304
25	12105625
26	18793091
27	21172347
28	33497008
29	21218429
30	56913569
31	29552671
32	64028672

[1, 47, 323, 1744, 3749, 15181, 19207, 59648, 84969, 176203, 175691, 563312, 399853, 902729, 1210927, 1970176, 1503377, 3993543, 2606419, 6538256, 6203861, 8257477, 6716183, 19266304, 12105625, 18793091, 21172347, 33497008, 21218429, 56913569, 29552671, 64028672]

cp's OEIS Frontend

A372937 a(n) = Sum_{1 <= x_1, x_2, x_3, x_4 <= n} gcd(x_1, x_2, x_3, x_4, n)^5.

Table of values

List of values