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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.

A342539 a(n) = Sum_{k=1..n} phi(gcd(k, n))^n.

Table of values

n a(n)
1 1
2 2
3 10
4 19
5 1028
6 132
7 279942
8 65798
9 10078726
10 2097160
11 100000000010
12 16797702
13 106993205379084
14 156728328204
15 35186519703560
16 281479271809036
17 295147905179352825872
18 203119914385420
19 708235345355337676357650
20 1152924803145924620
21 46005163783270994804748
22 20000000000000000000020

List of values

[1, 2, 10, 19, 1028, 132, 279942, 65798, 10078726, 2097160, 100000000010, 16797702, 106993205379084, 156728328204, 35186519703560, 281479271809036, 295147905179352825872, 203119914385420, 708235345355337676357650, 1152924803145924620, 46005163783270994804748, 20000000000000000000020]

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

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