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 | 3 |
| 3 | 6 |
| 4 | 9 |
| 5 | 13 |
| 6 | 17 |
| 7 | 29 |
| 8 | 63 |
| 9 | 90 |
| 10 | 531 |
| 11 | 14286 |
| 12 | 30617 |
| 13 | 37815 |