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 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 20 |
| 6 | 93 |
| 7 | 515 |
| 8 | 3701 |
| 9 | 32714 |
| 10 | 359289 |
| 11 | 4847830 |
| 12 | 80064871 |
| 13 | 1607606989 |
| 14 | 38983675574 |