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 | 2 |
| 2 | 9 |
| 3 | 73 |
| 4 | 1212 |
| 5 | 44667 |
| 6 | 3251186 |
| 7 | 345094227 |
| 8 | 39552733796 |
| 9 | 4234657495267 |
| 10 | 409948262617398 |
| 11 | 36190736880911571 |
| 12 | 2964860272283578040 |
| 13 | 229165985114590010307 |
| 14 | 16940021231116707830570 |