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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.

A013969 a(n) = sigma_21(n), the sum of the 21st powers of the divisors of n.

Table of values

n a(n)
1 1
2 2097153
3 10460353204
4 4398048608257
5 476837158203126
6 21936961102828212
7 558545864083284008
8 9223376434903384065
9 109418989141972712413
10 1000000476837160300278
11 7400249944258160101212
12 46005141850728850805428
13 247064529073450392704414
14 1171356134499851307229224

List of values

[1, 2097153, 10460353204, 4398048608257, 476837158203126, 21936961102828212, 558545864083284008, 9223376434903384065, 109418989141972712413, 1000000476837160300278, 7400249944258160101212, 46005141850728850805428, 247064529073450392704414, 1171356134499851307229224]

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

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