A078540 - cp's OEIS frontend

A078540 Least non-balanced x (i.e., not in A020492) such that sigma(p(n),x)/phi(x) is an integer, where p(n) = n-th prime.

n	a(n)
1	22
2	38
3	46
4	295
5	235
6	749
7	3687
8	6128
9	1415
10	4254
11	10451
12	8351
13	334
14	4511
15	3398
16	1286
17	148870
18	11015
19	35519
20	10239
21	14072
22	76088
23	5991
24	718
25	11654
26	30761
27	7431
28	20993
29	700654
30	22169
31	5095
32	4198
33	27415
34	26744
35	14318
36	48368
37	180878
38	16991
39	173123
40	4166
41	5033
42	7246

[22, 38, 46, 295, 235, 749, 3687, 6128, 1415, 4254, 10451, 8351, 334, 4511, 3398, 1286, 148870, 11015, 35519, 10239, 14072, 76088, 5991, 718, 11654, 30761, 7431, 20993, 700654, 22169, 5095, 4198, 27415, 26744, 14318, 48368, 180878, 16991, 173123, 4166, 5033, 7246]

cp's OEIS Frontend

A078540 Least non-balanced x (i.e., not in A020492) such that sigma(p(n),x)/phi(x) is an integer, where p(n) = n-th prime.

Table of values

List of values