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.

A019580 Place n distinguishable balls in n boxes (in n^n ways); let f(n,k) = number of ways that max in any box is k, for 1<=k<=n; sequence gives f(n,4)/n.

Table of values

n a(n)
4 1
5 20
6 375
7 7560
8 167825
9 4110120
10 110602800
11 3252075750
12 103881924300
13 3585467886000
14 133052005386300
15 5284678706307000
16 223761183682286250
17 10063370411081988000
18 479152851159102120000
19 24082014064135799772000

List of values

[1, 20, 375, 7560, 167825, 4110120, 110602800, 3252075750, 103881924300, 3585467886000, 133052005386300, 5284678706307000, 223761183682286250, 10063370411081988000, 479152851159102120000, 24082014064135799772000]