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.

A154586 Numbers n for which abs((-1)^k*Sum_{k=1..n} ((n-k+1) mod k)) = 0.

Table of values

n a(n)
1 1
2 4
3 8
4 25
5 27
6 75
7 209
8 3507
9 8466
10 16179
11 29285
12 33987
13 175904
14 326764
15 1161207

List of values

[1, 4, 8, 25, 27, 75, 209, 3507, 8466, 16179, 29285, 33987, 175904, 326764, 1161207]