cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A078539 Least non-balanced x (i.e., not in A020492) such that sigma(2n-1,x)/phi(x) is an integer.

Table of values

n a(n)
2 38
3 46
4 295
5 38
6 235
7 749
8 38
9 3687
10 6128
11 38
12 1415
13 46
14 38
15 4254
16 10451
17 38
18 46
19 8351
20 38
21 334
22 4511
23 38
24 3398
25 295
26 38
27 1286
28 46
29 38
30 148870
31 11015
32 38
33 46
34 35519
35 38
36 10239
37 14072
38 38
39 235
40 76088
41 38
42 5991
43 46
44 38
45 718
46 295
47 38
48 46
49 11654
50 38
51 30761

List of values

[38, 46, 295, 38, 235, 749, 38, 3687, 6128, 38, 1415, 46, 38, 4254, 10451, 38, 46, 8351, 38, 334, 4511, 38, 3398, 295, 38, 1286, 46, 38, 148870, 11015, 38, 46, 35519, 38, 10239, 14072, 38, 235, 76088, 38, 5991, 46, 38, 718, 295, 38, 46, 11654, 38, 30761]