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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.

A158280 Octosection: A145511(8n+4) or A145501(8n+4).

Table of values

n a(n)
0 7
1 21
2 21
3 21
4 42
5 21
6 21
7 63
8 21
9 21
10 63
11 21
12 42
13 70
14 21
15 21
16 63
17 63
18 21
19 63
20 21
21 21
22 126
23 21
24 42
25 63
26 21
27 63
28 63
29 21
30 21
31 126
32 63
33 21
34 63
35 21
36 21
37 126
38 63
39 21
40 105
41 21
42 63
43 63
44 21
45 63
46 63
47 63
48 21
49 126
50 21
51 21
52 189
53 21
54 21
55 63
56 21
57 63
58 126
59 63
60 42
61 63
62 70
63 21
64 63
65 21
66 63
67 210
68 21
69 21

List of values

[7, 21, 21, 21, 42, 21, 21, 63, 21, 21, 63, 21, 42, 70, 21, 21, 63, 63, 21, 63, 21, 21, 126, 21, 42, 63, 21, 63, 63, 21, 21, 126, 63, 21, 63, 21, 21, 126, 63, 21, 105, 21, 63, 63, 21, 63, 63, 63, 21, 126, 21, 21, 189, 21, 21, 63, 21, 63, 126, 63, 42, 63, 70, 21, 63, 21, 63, 210, 21, 21]

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