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) |
|---|---|
| 2 | 29 |
| 3 | 397 |
| 4 | 4999 |
| 5 | 59999 |
| 6 | 699967 |
| 7 | 7999993 |
| 8 | 89999999 |
| 9 | 999999937 |
| 10 | 1099999997 |
| 11 | 11999999983 |
| 12 | 129999999949 |
| 13 | 1399999999949 |
| 14 | 14999999999981 |
| 15 | 159999999999997 |
| 16 | 1699999999999967 |
| 17 | 17999999999999939 |
| 18 | 189999999999999941 |