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.

A089479 Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real n X n (0,1)-matrix takes the value k, for n >= 0, 0 <= k <= n!.

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 9
5 6
6 1
7 265
8 150
9 69
10 18
11 9
12 0
13 1
14 27713
15 13032
16 10800
17 4992
18 4254
19 1440
20 1536
21 576
22 648
23 24
24 288
25 96
26 48
27 0
28 72
29 0
30 0
31 0
32 16
33 0
34 0
35 0
36 0
37 0
38 1
39 10363361
40 3513720
41 4339440
42 2626800
43 3015450
44 1451400
45 1872800
46 962400
47 1295700
48 425400
49 873000

List of values

[0, 1, 1, 1, 9, 6, 1, 265, 150, 69, 18, 9, 0, 1, 27713, 13032, 10800, 4992, 4254, 1440, 1536, 576, 648, 24, 288, 96, 48, 0, 72, 0, 0, 0, 16, 0, 0, 0, 0, 0, 1, 10363361, 3513720, 4339440, 2626800, 3015450, 1451400, 1872800, 962400, 1295700, 425400, 873000]