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.

A088506 Number of permutations in the symmetric group S_n that have odd number of transpositions in their cycle decomposition.

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 6
5 30
6 240
7 1680
8 12600
9 113400
10 1149120
11 12640320
12 151351200
13 1967565600
14 27554567040
15 413318505600
16 6612836630400
17 112418222716800
18 2023536830515200
19 38447199779788800
20 768943660374489600
21 16147816867864281600
22 355251985172308224000

List of values

[0, 0, 1, 3, 6, 30, 240, 1680, 12600, 113400, 1149120, 12640320, 151351200, 1967565600, 27554567040, 413318505600, 6612836630400, 112418222716800, 2023536830515200, 38447199779788800, 768943660374489600, 16147816867864281600, 355251985172308224000]

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

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