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.

A098916 Permanent of the n X n (0,1)-matrices with ij-th entry equal to zero iff (i=1,j=1),(i=1,j=n),(i=n,j=1) and (i=n,j=n).

Table of values

n a(n)
3 0
4 4
5 36
6 288
7 2400
8 21600
9 211680
10 2257920
11 26127360
12 326592000
13 4390848000
14 63228211200
15 971415244800
16 15866448998400
17 274611617280000
18 5021469573120000
19 96746980442112000
20 1959126353952768000

List of values

[0, 4, 36, 288, 2400, 21600, 211680, 2257920, 26127360, 326592000, 4390848000, 63228211200, 971415244800, 15866448998400, 274611617280000, 5021469573120000, 96746980442112000, 1959126353952768000]