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 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 8 |
| 5 | 9 |
| 6 | 10 |
| 7 | 11 |
| 8 | 30 |
| 9 | 76 |
| 10 | 163 |
| 11 | 271 |
| 12 | 273 |
| 13 | 354 |
| 14 | 721 |
| 15 | 1796 |
| 16 | 3733 |
| 17 | 4769 |
| 18 | 9316 |
| 19 | 12221 |
| 20 | 41532 |