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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.

A156055 Define a map f by f(0) = f(1) = 0, otherwise f(k) = A087712(k); then a(n) is the number of steps for the trajectory of n under repeated iteration of f to "terminate".

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 4
6 30
7 7
8 54
9 3
10 32
11 5
12 29
13 31
14 0
15 3
16 19
17 8
18 112
19 55
20 15
21 27
22 3
23 3
24 26
25 1
26 20
27 223
28 102
29 33
30 13
31 6
32 162
33 1
34 9
35 10
36 75
37 30
38 113
39 21

List of values

[1, 2, 3, 6, 4, 30, 7, 54, 3, 32, 5, 29, 31, 0, 3, 19, 8, 112, 55, 15, 27, 3, 3, 26, 1, 20, 223, 102, 33, 13, 6, 162, 1, 9, 10, 75, 30, 113, 21]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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