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 | 2 |
| 2 | 13 |
| 3 | 113 |
| 4 | 1193 |
| 5 | 11939 |
| 6 | 193939 |
| 7 | 17773937 |
| 8 | 119139133 |
| 9 | 111133719913 |
| 10 | 111119917373 |
| 11 | 111393733793 |
| 12 | 1117739771979737 |