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 | 9 |
| 2 | 191 |
| 3 | 2725 |
| 4 | 41515 |
| 5 | 629659 |
| 6 | 9539915 |
| 7 | 144597047 |
| 8 | 2191517757 |
| 9 | 33214850067 |
| 10 | 503408006597 |
| 11 | 7629705089721 |
| 12 | 115636627121941 |
| 13 | 1752601092641329 |
| 14 | 26562609636801375 |
| 15 | 402585753260380041 |
| 16 | 6101632743611966643 |