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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 7 |
| 7 | 9 |
| 8 | 19 |
| 9 | 25 |
| 10 | 31 |
| 11 | 47 |
| 12 | 89 |
| 13 | 127 |
| 14 | 139 |
| 15 | 1369 |
| 16 | 2251 |
| 17 | 3271 |
| 18 | 4253 |
| 19 | 4373 |
| 20 | 4549 |
| 21 | 5449 |
| 22 | 13331 |
| 23 | 37123 |
| 24 | 55291 |
| 25 | 79633 |
| 26 | 105653 |