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 | 5 |
| 4 | 18 |
| 5 | 74 |
| 6 | 344 |
| 7 | 1679 |
| 8 | 8548 |
| 9 | 44690 |
| 10 | 238691 |
| 11 | 1295990 |
| 12 | 7132509 |