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 | 1 |
| 2 | 9 |
| 3 | 433 |
| 4 | 63225 |
| 5 | 18954001 |
| 6 | 10159366329 |
| 7 | 8924902306993 |
| 8 | 11969476975085625 |
| 9 | 23232038620328946001 |
| 10 | 62655369716047066046649 |
| 11 | 227268291642918880258797553 |
| 12 | 1079475019974966974009683584825 |
| 13 | 6565863403062578428919598754170001 |