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 | 7 |
| 3 | 239 |
| 4 | 268 |
| 5 | 307 |
| 6 | 18543 |
| 7 | 2943 |
| 8 | 485298 |
| 9 | 330182 |
| 10 | 478707 |
| 11 | 24208144 |
| 12 | 22709274 |
| 13 | 2189376182 |
| 14 | 284862638 |
| 15 | 599832943 |
| 16 | 19696179 |
| 17 | 314198789 |
| 18 | 3558066693 |
| 19 | 69971515635443 |
| 20 | 18986886768 |
| 21 | 18710140581 |
| 22 | 104279454193 |