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.

A290328 Iterate the map x -> A289667(x) starting at n; sequence gives number of steps to reach a prime, or -1 if no prime is ever reached.

Table of values

n a(n)
2 0
3 0
4 4
5 0
6 3
7 0
8 3
9 1
10 1
11 0
12 7
13 0
14 2
15 2
16 20
17 0
18 19
19 0
20 5
21 2
22 19
23 0
24 4
25 1
26 1
27 52
28 1
29 0
30 51
31 0
32 1
33 2
34 1
35 2
36 1
37 0
38 1
39 4
40 51
41 0
42 2
43 0
44 1
45 20
46 5
47 0

List of values

[0, 0, 4, 0, 3, 0, 3, 1, 1, 0, 7, 0, 2, 2, 20, 0, 19, 0, 5, 2, 19, 0, 4, 1, 1, 52, 1, 0, 51, 0, 1, 2, 1, 2, 1, 0, 1, 4, 51, 0, 2, 0, 1, 20, 5, 0]