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 | 3 |
| 4 | 6 |
| 5 | 15 |
| 6 | 25 |
| 7 | 35 |
| 8 | 56 |
| 9 | 227 |
| 10 | 398 |
| 11 | 847 |
| 12 | 986 |
| 13 | 1713 |
| 14 | 4589 |
| 15 | 6460 |
| 16 | 7465 |
| 17 | 24860 |
| 18 | 28741 |