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 | 258 |
| 3 | 13124 |
| 4 | 1810690 |
| 5 | 200781252 |
| 6 | 30729140484 |
| 7 | 4579408029576 |
| 8 | 770670360699138 |
| 9 | 132018919625044100 |
| 10 | 23913739057463037508 |
| 11 | 4433505541977804821256 |
| 12 | 848185646293853978499844 |
| 13 | 165563367990287610967653512 |
| 14 | 32993144260428865295508700680 |