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 | 9 |
| 3 | 67 |
| 4 | 437 |
| 5 | 441 |
| 6 | 2615 |
| 7 | 100349 |
| 8 | 100353 |
| 9 | 100359 |
| 10 | 637197 |
| 11 | 637305 |
| 12 | 27066969 |
| 13 | 27067049 |
| 14 | 27067101 |
| 15 | 27067113 |
| 16 | 27067115 |
| 17 | 179992839 |
| 18 | 179993001 |
| 19 | 55762149071 |
| 20 | 382465573491 |