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.

A351901 Number of permutations of [n] having at least one repeated cycle length.

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 10
5 46
6 246
7 1926
8 16080
9 143424
10 1397520
11 16163280
12 190902240
13 2534113440
14 35501044320
15 531674569440
16 8558324490240
17 147103748144640
18 2631981703680000
19 50393537347829760
20 1011054905709004800
21 21229069614652569600
22 468171587690550374400

List of values

[0, 0, 1, 1, 10, 46, 246, 1926, 16080, 143424, 1397520, 16163280, 190902240, 2534113440, 35501044320, 531674569440, 8558324490240, 147103748144640, 2631981703680000, 50393537347829760, 1011054905709004800, 21229069614652569600, 468171587690550374400]

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

Content is available under The OEIS End-User License Agreement.