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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 25 |
| 5 | 99 |
| 6 | 415 |
| 7 | 1849 |
| 8 | 8368 |
| 9 | 38712 |
| 10 | 181111 |
| 11 | 856833 |
| 12 | 4085025 |
| 13 | 19612082 |