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 | 12 |
| 2 | 120 |
| 3 | 1326 |
| 4 | 13888 |
| 5 | 145482 |
| 6 | 1504820 |
| 7 | 15586972 |
| 8 | 160772064 |
| 9 | 1658521710 |