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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.

A330786 Number of steps to reach 1 by iterating the absolute alternating sum-of-divisors function (A206369).

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 4
6 2
7 3
8 5
9 4
10 4
11 5
12 3
13 4
14 3
15 6
16 6
17 7
18 4
19 5
20 4
21 4
22 5
23 6
24 5
25 5
26 4
27 5
28 5
29 6
30 6
31 7
32 5
33 5
34 7
35 6
36 5
37 6
38 5
39 6
40 5
41 6
42 4
43 5
44 7
45 6
46 6
47 7
48 6
49 6
50 5
51 6
52 6
53 7
54 5
55 6
56 7
57 6
58 6
59 7
60 6
61 7
62 7
63 5
64 6
65 7
66 5
67 6
68 7
69 8
70 6
71 7
72 7
73 8
74 6
75 5
76 6
77 7
78 6
79 7
80 8
81 8
82 6
83 7
84 6
85 7
86 5
87 8
88 6
89 7
90 6

List of values

[0, 1, 2, 3, 4, 2, 3, 5, 4, 4, 5, 3, 4, 3, 6, 6, 7, 4, 5, 4, 4, 5, 6, 5, 5, 4, 5, 5, 6, 6, 7, 5, 5, 7, 6, 5, 6, 5, 6, 5, 6, 4, 5, 7, 6, 6, 7, 6, 6, 5, 6, 6, 7, 5, 6, 7, 6, 6, 7, 6, 7, 7, 5, 6, 7, 5, 6, 7, 8, 6, 7, 7, 8, 6, 5, 6, 7, 6, 7, 8, 8, 6, 7, 6, 7, 5, 8, 6, 7, 6]

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