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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.

A342420 a(n) = Sum_{k=1..n} (n/gcd(k,n))^(n/gcd(k,n)).

Table of values

n a(n)
1 1
2 5
3 55
4 517
5 12501
6 93371
7 4941259
8 67109381
9 2324522989
10 40000012505
11 2853116706111
12 35664401886907
13 3634501279107037
14 66672040958289359
15 3503151123046887555
16 147573952589743522309
17 13235844190181388226833
18 236078448451781550068849
19 35611553801885644604231623

List of values

[1, 5, 55, 517, 12501, 93371, 4941259, 67109381, 2324522989, 40000012505, 2853116706111, 35664401886907, 3634501279107037, 66672040958289359, 3503151123046887555, 147573952589743522309, 13235844190181388226833, 236078448451781550068849, 35611553801885644604231623]

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

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