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.

A336485 The least positive integer k for which there exist primes p, q, r such that phi(p*q*s^k) = phi(r*s^(2k+1)) and sigma(p*q*s^k) = sigma(r*s^(2k+1)), where s is the n-th prime.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 17
6 3
7 29
8 4
9 4
10 4
11 1
12 5
13 4
14 1
15 20
16 32
17 2
18 38
19 12
20 29
21 9
22 4
23 26
24 20
25 8
26 14
27 2
28 14
29 8
30 41
31 4

List of values

[1, 1, 1, 1, 17, 3, 29, 4, 4, 4, 1, 5, 4, 1, 20, 32, 2, 38, 12, 29, 9, 4, 26, 20, 8, 14, 2, 14, 8, 41, 4]