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 | 11 |
| 4 | 13 |
| 5 | 21 |
| 6 | 33 |
| 7 | 39 |
| 8 | 77 |
| 9 | 91 |
| 10 | 137 |
| 11 | 219 |
| 12 | 411 |
| 13 | 9091 |
| 14 | 29703 |
| 15 | 909091 |
| 16 | 5882353 |
| 17 | 10989011 |
| 18 | 12145749 |
| 19 | 12987013 |
| 20 | 14354067 |
| 21 | 20979021 |
| 22 | 22556391 |
| 23 | 32967033 |
| 24 | 38961039 |
| 25 | 52631579 |
| 26 | 76923077 |
| 27 | 90909091 |
| 28 | 297029703 |
| 29 | 1185770751 |
| 30 | 2479338843 |
| 31 | 4347826087 |
| 32 | 9090909091 |
| 33 | 13698630137 |