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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 2 |
| 9 | 24 |
| 10 | 3136 |
| 11 | 53798080 |
| 12 | 8607945812375585 |
| 13 | 220376367601372354229355484029120 |
| 14 | 78531983922879942351416192215114163135375656803468317366190276600 |