cp's OEIS Frontend

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.

A291356 a(n) is the smallest k such that usigma(k) = A002110(n), or 0 if no such k exists.

Table of values

n a(n)
0 1
1 0
2 5
3 18
4 164
5 1538
6 20018
7 408404
8 7759748
9 148728578
10 0
11 194482899488
12 0
13 286353189202064
14 0
15 491911826070793124
16 32087786808310197824
17 1809656800145141307344
18 113734187984879487014048
19 0
20 0
21 27153120399499349433747548978
22 0

List of values

[1, 0, 5, 18, 164, 1538, 20018, 408404, 7759748, 148728578, 0, 194482899488, 0, 286353189202064, 0, 491911826070793124, 32087786808310197824, 1809656800145141307344, 113734187984879487014048, 0, 0, 27153120399499349433747548978, 0]

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

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