A135324 - cp's OEIS frontend

A135324 a(n) = Sum_{k=1..phi(n)} k*t(k), where t(k) is the k-th positive integer which is coprime to n and phi(n) is the number of positive integers which are <= n and are coprime to n.

n	a(n)
1	1
2	1
3	5
4	7
5	30
6	11
7	91
8	50
9	120
10	64
11	385
12	76
13	650
14	191
15	354
16	372
17	1496
18	243
19	2109
20	468
21	1081
22	795
23	3795
24	560
25	3450
26	1336
27	3033
28	1432
29	7714
30	692
31	9455
32	2856
33	4595
34	3056
35	6974
36	1836
37	16206
38	4299
39	7766
40	3576
41	22140
42	2126
43	25585
44	6100
45	8922
46	7711
47	33511

[1, 1, 5, 7, 30, 11, 91, 50, 120, 64, 385, 76, 650, 191, 354, 372, 1496, 243, 2109, 468, 1081, 795, 3795, 560, 3450, 1336, 3033, 1432, 7714, 692, 9455, 2856, 4595, 3056, 6974, 1836, 16206, 4299, 7766, 3576, 22140, 2126, 25585, 6100, 8922, 7711, 33511]

cp's OEIS Frontend

A135324 a(n) = Sum_{k=1..phi(n)} k*t(k), where t(k) is the k-th positive integer which is coprime to n and phi(n) is the number of positive integers which are <= n and are coprime to n.

Table of values

List of values