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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.

A332759 Number of involutions (plus identity) in a fixed Sylow 2-subgroup of the symmetric group of degree n.

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 6
5 6
6 12
7 12
8 44
9 44
10 88
11 88
12 264
13 264
14 528
15 528
16 2064
17 2064
18 4128
19 4128
20 12384
21 12384
22 24768
23 24768
24 90816
25 90816
26 181632
27 181632
28 544896
29 544896
30 1089792
31 1089792
32 4292864
33 4292864
34 8585728
35 8585728
36 25757184
37 25757184
38 51514368
39 51514368

List of values

[1, 1, 2, 2, 6, 6, 12, 12, 44, 44, 88, 88, 264, 264, 528, 528, 2064, 2064, 4128, 4128, 12384, 12384, 24768, 24768, 90816, 90816, 181632, 181632, 544896, 544896, 1089792, 1089792, 4292864, 4292864, 8585728, 8585728, 25757184, 25757184, 51514368, 51514368]

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

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