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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.

A342435 a(n) = Sum_{k=1..n} gcd(k,n)^(gcd(k,n) - 2).

Table of values

n a(n)
1 1
2 2
3 5
4 19
5 129
6 1303
7 16813
8 262166
9 4782981
10 100000133
11 2357947701
12 61917365564
13 1792160394049
14 56693912392115
15 1946195068359645
16 72057594038190124
17 2862423051509815809
18 121439531096599037355

List of values

[1, 2, 5, 19, 129, 1303, 16813, 262166, 4782981, 100000133, 2357947701, 61917365564, 1792160394049, 56693912392115, 1946195068359645, 72057594038190124, 2862423051509815809, 121439531096599037355]

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

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