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 | 9 |
| 2 | 49 |
| 3 | 961 |
| 4 | 9409 |
| 5 | 97969 |
| 6 | 994009 |
| 7 | 9840769 |
| 8 | 99460729 |
| 9 | 999002449 |
| 10 | 9998200081 |
| 11 | 99996985729 |
| 12 | 999966000289 |
| 13 | 9999995824729 |
| 14 | 99999820000081 |
| 15 | 999997874844049 |
| 16 | 9999997800000121 |
| 17 | 99999977853408361 |
| 18 | 999999874000003969 |
| 19 | 9999999828172082689 |
| 20 | 99999999340000001089 |