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.

A168127 Numbers k such that Sum_{j=1..k} sigma(j) / sigma(k) is an integer.

Table of values

n a(n)
1 1
2 3
3 29
4 365
5 1225
6 81595
7 86249
8 185699
9 582917
10 11413204
11 16646745763
12 311408527843
13 709342670921
14 881267828693

List of values

[1, 3, 29, 365, 1225, 81595, 86249, 185699, 582917, 11413204, 16646745763, 311408527843, 709342670921, 881267828693]