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 | 9 |
| 2 | 18 |
| 3 | 111 |
| 4 | 212 |
| 5 | 1128 |
| 6 | 2067 |
| 7 | 11123 |
| 8 | 20270 |
| 9 | 110440 |
| 10 | 200971 |
| 11 | 1101475 |
| 12 | 2003592 |
| 13 | 11005388 |