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.

A002674 a(n) = (2n)!/2.

Table of values

n a(n)
1 1
2 12
3 360
4 20160
5 1814400
6 239500800
7 43589145600
8 10461394944000
9 3201186852864000
10 1216451004088320000
11 562000363888803840000
12 310224200866619719680000
13 201645730563302817792000000
14 152444172305856930250752000000
15 132626429906095529318154240000000

List of values

[1, 12, 360, 20160, 1814400, 239500800, 43589145600, 10461394944000, 3201186852864000, 1216451004088320000, 562000363888803840000, 310224200866619719680000, 201645730563302817792000000, 152444172305856930250752000000, 132626429906095529318154240000000]