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 | 2 |
| 3 | 4 |
| 4 | 12 |
| 5 | 29 |
| 6 | 93 |
| 7 | 249 |
| 8 | 803 |
| 9 | 2337 |
| 10 | 7480 |
| 11 | 23130 |
| 12 | 77372 |
| 13 | 247598 |
| 14 | 834507 |
| 15 | 2762222 |