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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.

A216651 Lengths of decreasing blocks of A006530, the greatest prime factor of n, starting from the second term.

Table of values

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

List of values

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

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