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 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 68 |
| 5 | 550 |
| 6 | 5328 |
| 7 | 52484 |
| 8 | 534793 |
| 9 | 5513338 |
| 10 | 57494308 |
| 11 | 604212943 |
| 12 | 6392547793 |
| 13 | 68014392915 |