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 | 7 |
| 2 | 19 |
| 3 | 199 |
| 4 | 1009 |
| 5 | 19417 |
| 6 | 160009 |
| 7 | 1086791 |
| 8 | 10301299 |
| 9 | 139993999 |
| 10 | 1391909989 |
| 11 | 10597399381 |
| 12 | 108979916999 |
| 13 | 1993999651909 |
| 14 | 13924969999799 |