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 | 5 |
| 3 | 21 |
| 4 | 29 |
| 5 | 41 |
| 6 | 65 |
| 7 | 243 |
| 8 | 305 |
| 9 | 389 |
| 10 | 509 |
| 11 | 819 |
| 12 | 1653 |
| 13 | 7493 |
| 14 | 8613 |
| 15 | 8619 |
| 16 | 10257 |
| 17 | 11829 |
| 18 | 12977 |
| 19 | 15651 |
| 20 | 24341 |
| 21 | 29367 |
| 22 | 31629 |
| 23 | 40173 |