A373007 - cp's OEIS frontend

A373007 a(n) = Sum_{1 <= x_1, x_2, x_3, x_4, x_5 <= n} ( n/gcd(x_1, x_2, x_3, x_4, x_5, n) )^2.

n	a(n)
1	1
2	125
3	2179
4	15997
5	78101
6	272375
7	823495
8	2047613
9	4765465
10	9762625
11	19487051
12	34857463
13	62748349
14	102936875
15	170182079
16	262094461
17	410338385
18	595683125
19	893871379
20	1249381697
21	1794395605
22	2435881375
23	3404824919
24	4461748727
25	6101640601
26	7843543625
27	10422071947

[1, 125, 2179, 15997, 78101, 272375, 823495, 2047613, 4765465, 9762625, 19487051, 34857463, 62748349, 102936875, 170182079, 262094461, 410338385, 595683125, 893871379, 1249381697, 1794395605, 2435881375, 3404824919, 4461748727, 6101640601, 7843543625, 10422071947]

cp's OEIS Frontend

A373007 a(n) = Sum_{1 <= x_1, x_2, x_3, x_4, x_5 <= n} ( n/gcd(x_1, x_2, x_3, x_4, x_5, n) )^2.

Table of values

List of values