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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 15 |
| 4 | 204 |
| 5 | 2251 |
| 6 | 23715 |
| 7 | 240528 |
| 8 | 2391394 |
| 9 | 23540109 |
| 10 | 230318080 |
| 11 | 2244729936 |
| 12 | 21819401038 |
| 13 | 211711461260 |
| 14 | 2051836712085 |