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) |
|---|---|
| 0 | 1 |
| 1 | 91 |
| 2 | 2161 |
| 3 | 24691 |
| 4 | 176251 |
| 5 | 907753 |
| 6 | 3685123 |
| 7 | 12494233 |
| 8 | 36808723 |
| 9 | 96918753 |
| 10 | 232834755 |
| 11 | 518344905 |
| 12 | 1082218305 |
| 13 | 2139007755 |
| 14 | 4032416505 |
| 15 | 7294752507 |
| 16 | 12726601437 |
| 17 | 21501506127 |
| 18 | 35301145037 |
| 19 | 56487256007 |