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) |
|---|---|
| 2 | 2 |
| 3 | 2 |
| 4 | 3 |
| 5 | 23 |
| 6 | 5 |
| 7 | 47 |
| 8 | 7 |
| 9 | 79 |
| 10 | 997 |
| 11 | 5559917313492231463 |
| 12 | 11 |
| 13 | 167 |
| 14 | 13 |
| 15 | 223 |
| 16 | 4093 |
| 17 | 24137563 |
| 18 | 17 |
| 19 | 359 |
| 20 | 19 |
| 21 | 439 |
| 22 | 10947877107572929152919737180202022857988400441953615831 |