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 | 8 |
| 2 | 81 |
| 3 | 810 |
| 4 | 8100 |
| 5 | 81000 |
| 6 | 810000 |
| 7 | 8100000 |
| 8 | 81000000 |
| 9 | 810000000 |
| 10 | 8100000000 |
| 11 | 81000000000 |
| 12 | 810000000000 |
| 13 | 8100000000000 |
| 14 | 81000000000000 |
| 15 | 810000000000000 |
| 16 | 8100000000000000 |
| 17 | 81000000000000000 |
| 18 | 810000000000000000 |