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 | 1 |
| 2 | 3 |
| 3 | 48 |
| 4 | 828 |
| 5 | 8820 |
| 6 | 26100 |
| 7 | 417600 |
| 8 | 2114100 |
| 9 | 3009600 |
| 10 | 43864128 |
| 11 | 200278848 |
| 12 | 1013911668 |
| 13 | 7823392500 |
| 14 | 16222586688 |
| 15 | 259561387008 |
| 16 | 633694792500 |
| 17 | 4152982192128 |