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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.

A342620 a(n) = Sum_{d|n} phi(n/d)^(n+d+1).

Table of values

n a(n)
1 1
2 2
3 33
4 66
5 16385
6 770
7 10077697
8 1050626
9 362805249
10 83886082
11 10000000000001
12 268664834
13 15407021574586369
14 19747769352194
15 2252074693689345
16 18014673389486082
17 75557863725914323419137
18 25593109118189570
19 229468251895129407139872769
20 73788172563556335618
21 6624765697237267477692417
22 11000000000000000000000002

List of values

[1, 2, 33, 66, 16385, 770, 10077697, 1050626, 362805249, 83886082, 10000000000001, 268664834, 15407021574586369, 19747769352194, 2252074693689345, 18014673389486082, 75557863725914323419137, 25593109118189570, 229468251895129407139872769, 73788172563556335618, 6624765697237267477692417, 11000000000000000000000002]

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

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