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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 22 |
| 6 | 52 |
| 7 | 136 |
| 8 | 190 |
| 9 | 1610 |
| 10 | 12760 |
| 11 | 35464 |
| 12 | 196840 |
| 13 | 2112320 |
| 14 | 4093600 |
| 15 | 22789360 |
| 16 | 288608320 |