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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.

A243307 a(n) = 2^phi(n) + phi(n).

Table of values

n a(n)
1 3
2 3
3 6
4 6
5 20
6 6
7 70
8 20
9 70
10 20
11 1034
12 20
13 4108
14 70
15 264
16 264
17 65552
18 70
19 262162
20 264
21 4108
22 1034
23 4194326
24 264
25 1048596
26 4108
27 262162
28 4108
29 268435484
30 264
31 1073741854
32 65552
33 1048596
34 65552
35 16777240
36 4108
37 68719476772
38 262162
39 16777240
40 65552

List of values

[3, 3, 6, 6, 20, 6, 70, 20, 70, 20, 1034, 20, 4108, 70, 264, 264, 65552, 70, 262162, 264, 4108, 1034, 4194326, 264, 1048596, 4108, 262162, 4108, 268435484, 264, 1073741854, 65552, 1048596, 65552, 16777240, 4108, 68719476772, 262162, 16777240, 65552]

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

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