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 | 8 |
| 1 | 36 |
| 2 | 204 |
| 3 | 1296 |
| 4 | 8772 |
| 5 | 61776 |
| 6 | 446964 |
| 7 | 3297456 |
| 8 | 24684612 |
| 9 | 186884496 |
| 10 | 1427557524 |
| 11 | 10983260016 |
| 12 | 84998999652 |
| 13 | 660994932816 |
| 14 | 5161010498484 |
| 15 | 40433724284976 |
| 16 | 317685943157892 |
| 17 | 2502137235710736 |
| 18 | 19748255868485844 |
| 19 | 156142792528260336 |
| 20 | 1236466399775623332 |