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 | 12 |
| 1 | 102 |
| 2 | 1002 |
| 3 | 10002 |
| 4 | 100002 |
| 5 | 1000002 |
| 6 | 10000002 |
| 7 | 100000002 |
| 8 | 1000000002 |
| 9 | 10000000002 |
| 10 | 100000000002 |
| 11 | 1000000000002 |
| 12 | 10000000000002 |
| 13 | 100000000000002 |
| 14 | 1000000000000002 |
| 15 | 10000000000000002 |
| 16 | 100000000000000002 |
| 17 | 1000000000000000002 |
| 18 | 10000000000000000002 |