A174405 - cp's OEIS frontend

A174405 Partial sums of Sum_{k=1..n} n/gcd(n,k), or partial sums of Sum_{d|n} d*phi(d) (see A057660).

n	a(n)
1	1
2	4
3	11
4	22
5	43
6	64
7	107
8	150
9	211
10	274
11	385
12	462
13	619
14	748
15	895
16	1066
17	1339
18	1522
19	1865
20	2096
21	2397
22	2730
23	3237
24	3538
25	4059
26	4530
27	5077
28	5550
29	6363
30	6804
31	7735
32	8418
33	9195
34	10014
35	10917
36	11588
37	12921
38	13950
39	15049
40	15952
41	17593
42	18496
43	20303
44	21524
45	22805
46	24326
47	26489
48	27686
49	29787
50	31350
51	33261
52	34988

[1, 4, 11, 22, 43, 64, 107, 150, 211, 274, 385, 462, 619, 748, 895, 1066, 1339, 1522, 1865, 2096, 2397, 2730, 3237, 3538, 4059, 4530, 5077, 5550, 6363, 6804, 7735, 8418, 9195, 10014, 10917, 11588, 12921, 13950, 15049, 15952, 17593, 18496, 20303, 21524, 22805, 24326, 26489, 27686, 29787, 31350, 33261, 34988]

cp's OEIS Frontend

A174405 Partial sums of Sum_{k=1..n} n/gcd(n,k), or partial sums of Sum_{d|n} d*phi(d) (see A057660).

Table of values

List of values