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 | 0 |
| 2 | 0 |
| 3 | 525 |
| 4 | 8325 |
| 5 | 95046 |
| 6 | 987048 |
| 7 | 9969183 |
| 8 | 99932013 |
| 9 | 999859093 |
| 10 | 9999722967 |
| 11 | 99999479435 |
| 12 | 999999059545 |
| 13 | 9999998358645 |
| 14 | 99999997221695 |
| 15 | 999999995423887 |
| 16 | 9999999992645451 |
| 17 | 99999999988439336 |
| 18 | 999999999982190246 |
| 19 | 9999999999973063281 |
| 20 | 99999999999959940181 |
| 21 | 999999999999941340896 |