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 | 8 |
| 2 | 96 |
| 3 | 992 |
| 4 | 9984 |
| 5 | 99968 |
| 6 | 999936 |
| 7 | 9999872 |
| 8 | 99999744 |
| 9 | 999999488 |
| 10 | 9999998976 |
| 11 | 99999997952 |
| 12 | 999999995904 |
| 13 | 9999999991808 |
| 14 | 99999999983616 |
| 15 | 999999999967232 |
| 16 | 9999999999934464 |
| 17 | 99999999999868928 |
| 18 | 999999999999737856 |
| 19 | 9999999999999475712 |
| 20 | 99999999999998951424 |
| 21 | 999999999999997902848 |