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.

A087137 a(n) is the number of permutations in the symmetric group S_n that contain an odd cycle.

Table of values

n a(n)
0 0
1 1
2 1
3 6
4 15
5 120
6 495
7 5040
8 29295
9 362880
10 2735775
11 39916800
12 370945575
13 6227020800
14 68916822975
15 1307674368000
16 16813959537375
17 355687428096000
18 5214921734397375
19 121645100408832000
20 2004231846526284375
21 51090942171709440000
22 934957186489800849375

List of values

[0, 1, 1, 6, 15, 120, 495, 5040, 29295, 362880, 2735775, 39916800, 370945575, 6227020800, 68916822975, 1307674368000, 16813959537375, 355687428096000, 5214921734397375, 121645100408832000, 2004231846526284375, 51090942171709440000, 934957186489800849375]

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

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