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.
n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 56 |
5 | 330 |
6 | 5724 |
7 | 68460 |
8 | 1351552 |
9 | 24594192 |
10 | 578257200 |
11 | 13915923120 |
12 | 389216689344 |
13 | 11518744311360 |
14 | 377576873670528 |
15 | 13185760854520800 |
16 | 497969104450867200 |
17 | 19992393239486976000 |
18 | 856421361373185137664 |
19 | 38819358713756193292800 |