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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.

A242099 Number of conjugacy classes of the symmetric group S_n when conjugating by the dihedral group D_n.

Table of values

n a(n)
1 1
2 2
3 3
4 8
5 18
6 84
7 387
8 2670
9 20373
10 182796
11 1816325
12 19973962
13 239523846
14 3113717784
15 43589470208
16 653840410004
17 10461400104968
18 177843770847822
19 3201186945761289
20 60822551319191028
21 1216451005946790780
22 25545471110008012860
23 562000363929678643211

List of values

[1, 2, 3, 8, 18, 84, 387, 2670, 20373, 182796, 1816325, 19973962, 239523846, 3113717784, 43589470208, 653840410004, 10461400104968, 177843770847822, 3201186945761289, 60822551319191028, 1216451005946790780, 25545471110008012860, 562000363929678643211]

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

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