A372638 - cp's OEIS frontend

A372638 a(n) = (1/6) * Sum_{k=1..n} phi(7*k).

n	a(n)
1	1
2	2
3	4
4	6
5	10
6	12
7	19
8	23
9	29
10	33
11	43
12	47
13	59
14	66
15	74
16	82
17	98
18	104
19	122
20	130
21	144
22	154
23	176
24	184
25	204
26	216
27	234
28	248
29	276
30	284
31	314
32	330
33	350
34	366
35	394
36	406
37	442
38	460
39	484
40	500
41	540
42	554
43	596
44	616
45	640
46	662
47	708
48	724
49	773
50	793
51	825
52	849
53	901
54	919
55	959
56	987
57	1023

[1, 2, 4, 6, 10, 12, 19, 23, 29, 33, 43, 47, 59, 66, 74, 82, 98, 104, 122, 130, 144, 154, 176, 184, 204, 216, 234, 248, 276, 284, 314, 330, 350, 366, 394, 406, 442, 460, 484, 500, 540, 554, 596, 616, 640, 662, 708, 724, 773, 793, 825, 849, 901, 919, 959, 987, 1023]

cp's OEIS Frontend

A372638 a(n) = (1/6) * Sum_{k=1..n} phi(7*k).

Table of values

List of values