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.

A092591 Exponents m such that 1-A065395(2^m) is a power of 2, where A065395(n) = sigma(phi(n)) - phi(sigma(n)).

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 4
6 6
7 7
8 12
9 15
10 16
11 18
12 30
13 31
14 60
15 88
16 106
17 126
18 520
19 606
20 1278
21 2202
22 2280
23 3216
24 4252
25 4422
26 9688
27 9940
28 11212
29 19936
30 21700
31 23208
32 44496
33 86242
34 110502
35 132048
36 216090
37 756838
38 859432
39 1257786
40 1398268
41 2976220
42 3021376
43 6972592
44 13466916
45 20996010
46 24036582
47 25964950
48 30402456
49 32582656
50 37156666
51 42643800
52 43112608
53 57885160

List of values

[0, 1, 2, 3, 4, 6, 7, 12, 15, 16, 18, 30, 31, 60, 88, 106, 126, 520, 606, 1278, 2202, 2280, 3216, 4252, 4422, 9688, 9940, 11212, 19936, 21700, 23208, 44496, 86242, 110502, 132048, 216090, 756838, 859432, 1257786, 1398268, 2976220, 3021376, 6972592, 13466916, 20996010, 24036582, 25964950, 30402456, 32582656, 37156666, 42643800, 43112608, 57885160]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.