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 | 1 |
| 1 | 12 |
| 2 | 132 |
| 3 | 1404 |
| 4 | 14652 |
| 5 | 151116 |
| 6 | 1546332 |
| 7 | 15734460 |
| 8 | 159425580 |
| 9 | 1609987708 |
| 10 | 16215457188 |
| 11 | 162961837500 |
| 12 | 1634743178420 |
| 13 | 16373484437340 |
| 14 | 163778159931180 |
| 15 | 1636328839130860 |