cp's OEIS Frontend

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.

A088336 Number of permutations in the symmetric group S_n that have even number of transpositions in their cycle decomposition.

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 18
5 90
6 480
7 3360
8 27720
9 249480
10 2479680
11 27276480
12 327650400
13 4259455200
14 59623724160
15 894355862400
16 14309953257600
17 243269205379200
18 4378836875212800
19 83197900629043200
20 1663958347802150400
21 34943125303845158400
22 768748742605299456000

List of values

[1, 1, 1, 3, 18, 90, 480, 3360, 27720, 249480, 2479680, 27276480, 327650400, 4259455200, 59623724160, 894355862400, 14309953257600, 243269205379200, 4378836875212800, 83197900629043200, 1663958347802150400, 34943125303845158400, 768748742605299456000]

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

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