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 | -156 |
| 3 | -5561 |
| 4 | -55536 |
| 5 | -290625 |
| 6 | -679616 |
| 7 | 4235199 |
| 8 | 83222784 |
| 9 | 956953279 |
| 10 | 9900000000 |
| 11 | 99785641119 |
| 12 | 999570018304 |
| 13 | 9999184269279 |
| 14 | 99998524210944 |
| 15 | 999997437109375 |
| 16 | 9999995705032704 |
| 17 | 99999993024242559 |
| 18 | 999999988980039424 |