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.

A057693 Number of permutations on n letters that have only cycles of length 3 or less.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 18
5 66
6 276
7 1212
8 5916
9 31068
10 171576
11 1014696
12 6319512
13 41143896
14 281590128
15 2007755856
16 14871825936
17 114577550352
18 913508184096
19 7526682826848
20 64068860545056
21 561735627038496
22 5068388485760832
23 47026385852423616
24 447837548306401728

List of values

[1, 1, 2, 6, 18, 66, 276, 1212, 5916, 31068, 171576, 1014696, 6319512, 41143896, 281590128, 2007755856, 14871825936, 114577550352, 913508184096, 7526682826848, 64068860545056, 561735627038496, 5068388485760832, 47026385852423616, 447837548306401728]

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

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