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.

A058811 Number of nodes at the n-th level of the Inverse-Totient-Tree (ITT) with the root at 1, and edges connecting number m to all numbers k such that phi(k) = m.

Table of values

n a(n)
0 1
1 1
2 3
3 8
4 17
5 41
6 92
7 215
8 487
9 1126
10 2583
11 5981
12 13698
13 31647
14 72678
15 167474
16 385021
17 887133
18 2041375
19 4700526
20 10817997
21 24908164
22 57334111
23 131995229

List of values

[1, 1, 3, 8, 17, 41, 92, 215, 487, 1126, 2583, 5981, 13698, 31647, 72678, 167474, 385021, 887133, 2041375, 4700526, 10817997, 24908164, 57334111, 131995229]