A344525 - cp's OEIS frontend

A344525 a(n) = Sum_{1 <= x_1, x_2, ... , x_n <= n} gcd(x_1,x_2, ... ,x_n).

n	a(n)
1	1
2	5
3	30
4	276
5	3165
6	47521
7	826000
8	16843792
9	387723045
10	10009889889
11	285360865350
12	8918311872516
13	302888304741841
14	11112685595264369
15	437898699063881208
16	18447025862624951488
17	827242515246907227633
18	39346558373191515582161

[1, 5, 30, 276, 3165, 47521, 826000, 16843792, 387723045, 10009889889, 285360865350, 8918311872516, 302888304741841, 11112685595264369, 437898699063881208, 18447025862624951488, 827242515246907227633, 39346558373191515582161]

cp's OEIS Frontend

A344525 a(n) = Sum_{1 <= x_1, x_2, ... , x_n <= n} gcd(x_1,x_2, ... ,x_n).

Table of values

List of values