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 | 7 |
| 4 | 9 |
| 5 | 23 |
| 6 | 29 |
| 7 | 33 |
| 8 | 185 |
| 9 | 267 |
| 10 | 307 |
| 11 | 757 |
| 12 | 897 |
| 13 | 1571 |
| 14 | 2977 |
| 15 | 3831 |
| 16 | 4595 |
| 17 | 6573 |
| 18 | 9511 |
| 19 | 11651 |
| 20 | 15641 |
| 21 | 68885 |
| 22 | 69883 |