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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.

A342396 a(n) = Sum_{k=1..n} k^(n/gcd(k,n) - 1).

Table of values

n a(n)
1 1
2 2
3 6
4 31
5 355
6 3150
7 67172
8 904085
9 22998481
10 427799450
11 14914341926
12 287337926355
13 13421957361111
14 339940911160914
15 15434209582905140
16 493467700905592777
17 28101527071305611529
18 836396358233559195382

List of values

[1, 2, 6, 31, 355, 3150, 67172, 904085, 22998481, 427799450, 14914341926, 287337926355, 13421957361111, 339940911160914, 15434209582905140, 493467700905592777, 28101527071305611529, 836396358233559195382]

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

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