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 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 7 |
| 7 | 14 |
| 8 | 23 |
| 9 | 46 |
| 10 | 85 |
| 11 | 165 |
| 12 | 313 |
| 13 | 625 |
| 14 | 1225 |
| 15 | 2459 |
| 16 | 4919 |
| 17 | 9928 |
| 18 | 20078 |
| 19 | 40926 |
| 20 | 83592 |