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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.

A062553 Number of Abelian subgroups of the dihedral group with 2n elements.

Table of values

n a(n)
1 2
2 5
3 5
4 9
5 7
6 13
7 9
8 16
9 12
10 19
11 13
12 24
13 15
14 25
15 19
16 29
17 19
18 33
19 21
20 36
21 25
22 37
23 25
24 44
25 28
26 43
27 31
28 48
29 31
30 53
31 33
32 54
33 37
34 55
35 39
36 63
37 39
38 61
39 43
40 68
41 43
42 71
43 45
44 72
45 51
46 73
47 49
48 82
49 52
50 81
51 55
52 84
53 55
54 89
55 59
56 92
57 61
58 91
59 61
60 102
61 63
62 97
63 69
64 103
65 69
66 107
67 69
68 108
69 73

List of values

[2, 5, 5, 9, 7, 13, 9, 16, 12, 19, 13, 24, 15, 25, 19, 29, 19, 33, 21, 36, 25, 37, 25, 44, 28, 43, 31, 48, 31, 53, 33, 54, 37, 55, 39, 63, 39, 61, 43, 68, 43, 71, 45, 72, 51, 73, 49, 82, 52, 81, 55, 84, 55, 89, 59, 92, 61, 91, 61, 102, 63, 97, 69, 103, 69, 107, 69, 108, 73]

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

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