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.

A227502 Numbers n such that Sum_{i=1..n} i^(i') == 0 (mod n), where i' is the arithmetic derivative of i.

Table of values

n a(n)
1 1
2 3
3 7
4 19
5 32
6 57
7 99
8 103
9 439
10 540
11 2656
12 18156
13 179171
14 235056

List of values

[1, 3, 7, 19, 32, 57, 99, 103, 439, 540, 2656, 18156, 179171, 235056]