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 | 3 |
| 2 | 37 |
| 3 | 489 |
| 4 | 5905 |
| 5 | 67233 |
| 6 | 737857 |
| 7 | 7902849 |
| 8 | 83222785 |
| 9 | 865782273 |
| 10 | 8926258177 |
| 11 | 91410065409 |
| 12 | 931280523265 |
| 13 | 9450244186113 |
| 14 | 95601953488897 |
| 15 | 964815627911169 |
| 16 | 9718525023289345 |
| 17 | 97748200186314753 |
| 18 | 981985601490518017 |