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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.

A230305 Iterate A080670 starting at n; a(n) = 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 2
5 0
6 1
7 0
8 1
9 4
10 3
11 0
12 1
13 0
14 3
15 4
16 2
17 0
18 3
19 0

List of values

[0, 0, 2, 0, 1, 0, 1, 4, 3, 0, 1, 0, 3, 4, 2, 0, 3, 0]

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