A278049 - cp's OEIS frontend

A278049 a(n) = 3*(Sum_{k=1..n} phi(k)) - 1, where phi = A000010.

n	a(n)
1	2
2	5
3	11
4	17
5	29
6	35
7	53
8	65
9	83
10	95
11	125
12	137
13	173
14	191
15	215
16	239
17	287
18	305
19	359
20	383
21	419
22	449
23	515
24	539
25	599
26	635
27	689
28	725
29	809
30	833
31	923
32	971
33	1031
34	1079
35	1151
36	1187
37	1295
38	1349
39	1421
40	1469
41	1589
42	1625
43	1751
44	1811
45	1883
46	1949
47	2087
48	2135
49	2261
50	2321
51	2417
52	2489
53	2645
54	2699
55	2819
56	2891
57	2999

[2, 5, 11, 17, 29, 35, 53, 65, 83, 95, 125, 137, 173, 191, 215, 239, 287, 305, 359, 383, 419, 449, 515, 539, 599, 635, 689, 725, 809, 833, 923, 971, 1031, 1079, 1151, 1187, 1295, 1349, 1421, 1469, 1589, 1625, 1751, 1811, 1883, 1949, 2087, 2135, 2261, 2321, 2417, 2489, 2645, 2699, 2819, 2891, 2999]

cp's OEIS Frontend

A278049 a(n) = 3*(Sum_{k=1..n} phi(k)) - 1, where phi = A000010.

Table of values

List of values