A070639 - cp's OEIS frontend

A070639 a(n) = (1/phi(n))Sum_{k=1..n} phi(nk).

n	a(n)
1	1
2	3
3	5
4	9
5	11
6	20
7	19
8	31
9	33
10	48
11	43
12	73
13	59
14	90
15	88
16	111
17	97
18	159
19	121
20	182
21	165
22	208
23	173
24	277
25	211
26	290
27	263
28	338
29	271
30	445
31	309
32	435
33	396
34	490
35	414
36	608
37	433
38	610
39	544
40	695
41	531
42	844
43	585
44	818
45	745
46	880
47	697
48	1080
49	773
50	1085
51	918
52	1126
53	883
54	1364
55	995

[1, 3, 5, 9, 11, 20, 19, 31, 33, 48, 43, 73, 59, 90, 88, 111, 97, 159, 121, 182, 165, 208, 173, 277, 211, 290, 263, 338, 271, 445, 309, 435, 396, 490, 414, 608, 433, 610, 544, 695, 531, 844, 585, 818, 745, 880, 697, 1080, 773, 1085, 918, 1126, 883, 1364, 995]

cp's OEIS Frontend

A070639 a(n) = (1/phi(n))Sum_{k=1..n} phi(nk).

Table of values

List of values

cp's OEIS Frontend

A070639 a(n) = (1/phi(n))*Sum_{k=1..n} phi(n*k).

Table of values

List of values

A070639 a(n) = (1/phi(n))Sum_{k=1..n} phi(nk).