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 | 0 |
| 2 | 9 |
| 3 | 6144 |
| 4 | 8850 |
| 5 | 63294 |
| 6 | 167460 |
| 7 | 1471350 |
| 8 | 17358894 |
| 9 | 19273044 |
| 10 | 90701559 |
| 11 | 153178644 |
| 12 | 189719685 |
| 13 | 197747394 |
| 14 | 2017743225 |
| 15 | 6233637435 |
| 16 | 59571334269 |
| 17 | 86021383575 |
| 18 | 156569713710 |
| 19 | 2073505928019 |
| 20 | 2889765691185 |
| 21 | 17962980751950 |
| 22 | 56300638961700 |
| 23 | 277087084821075 |
| 24 | 329363647943184 |