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.

A222174 Numbers n such that sigma(n) + sigma(n-1) = 3n, where sigma(n) = sum of divisors of n (A000203).

Table of values

n a(n)
1 6
2 34
3 50
4 236
5 262
6 386
7 898
8 8362
9 26938
10 46594
11 80876
12 5244548
13 5462384
14 17062316
15 323987588
16 1162300834
17 1381439876

List of values

[6, 34, 50, 236, 262, 386, 898, 8362, 26938, 46594, 80876, 5244548, 5462384, 17062316, 323987588, 1162300834, 1381439876]