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 | 9 |
| 2 | 121 |
| 3 | 2025 |
| 4 | 38025 |
| 5 | 762129 |
| 6 | 15912121 |
| 7 | 341621289 |
| 8 | 7484845225 |
| 9 | 166549691025 |
| 10 | 3751508008161 |
| 11 | 85341068948529 |
| 12 | 1957289174870121 |
| 13 | 45199191579030225 |
| 14 | 1049893021288265625 |
| 15 | 24510327614556266025 |
| 16 | 574726636455361317225 |
| 17 | 13528549573868347823025 |
| 18 | 319541915502909478890625 |