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.

A210116 Floor of the expected value of number of trials until exactly five cells are empty in a random distribution of n balls in n cells.

Table of values

n a(n)
6 7776
7 311
8 51
9 16
10 7
11 4
12 3
13 3
14 2
15 3
16 3
17 4
18 5
19 8
20 11
21 16
22 25
23 40
24 66
25 110
26 187
27 325
28 574
29 1032
30 1885
31 3492
32 6557
33 12467
34 23988
35 46667
36 91731
37 182078
38 364734
39 736972
40 1501318
41 3082136
42 6374007
43 13273719
44 27825438
45 58697777
46 124566798

List of values

[7776, 311, 51, 16, 7, 4, 3, 3, 2, 3, 3, 4, 5, 8, 11, 16, 25, 40, 66, 110, 187, 325, 574, 1032, 1885, 3492, 6557, 12467, 23988, 46667, 91731, 182078, 364734, 736972, 1501318, 3082136, 6374007, 13273719, 27825438, 58697777, 124566798]