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.

A050212 Triangle of number of permutations of {1, 2, ..., n} having exactly k cycles, each of which is of length >=r for r=4.

Table of values

n a(n)
4 6
5 24
6 120
7 720
8 5040
9 1260
10 40320
11 18144
12 362880
13 223776
14 3628800
15 2756160
16 39916800
17 35307360
18 1247400
19 479001600
20 476910720
21 38918880
22 6227020800
23 6822541440
24 889945056
25 87178291200
26 103440879360
27 18478684224

List of values

[6, 24, 120, 720, 5040, 1260, 40320, 18144, 362880, 223776, 3628800, 2756160, 39916800, 35307360, 1247400, 479001600, 476910720, 38918880, 6227020800, 6822541440, 889945056, 87178291200, 103440879360, 18478684224]