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.

A285854 Number of permutations of [n] with three ordered cycles such that equal-sized cycles are ordered with increasing least elements.

Table of values

n a(n)
3 1
4 18
5 105
6 1005
7 6762
8 61572
9 558548
10 5807700
11 62757288
12 777291768
13 9831740256
14 139111566048
15 2048834965824
16 32758018496640
17 545051532176640
18 9812211976039680
19 182219827628874240
20 3627461543458659840
21 74765368810365696000
22 1632210845693218560000

List of values

[1, 18, 105, 1005, 6762, 61572, 558548, 5807700, 62757288, 777291768, 9831740256, 139111566048, 2048834965824, 32758018496640, 545051532176640, 9812211976039680, 182219827628874240, 3627461543458659840, 74765368810365696000, 1632210845693218560000]

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

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