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 | 9 |
| 1 | 55 |
| 2 | 999 |
| 3 | 6049 |
| 4 | 109881 |
| 5 | 665335 |
| 6 | 12085911 |
| 7 | 73180801 |
| 8 | 1329340329 |
| 9 | 8049222775 |
| 10 | 146215350279 |
| 11 | 885341324449 |
| 12 | 16082359190361 |
| 13 | 97379496466615 |
| 14 | 1768913295589431 |
| 15 | 10710859270003201 |
| 16 | 194564380155647049 |
| 17 | 1178097140203885495 |
| 18 | 21400312903825585959 |