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 | 154 |
| 3 | 2340 |
| 4 | 38325 |
| 5 | 704102 |
| 6 | 14570976 |
| 7 | 337738758 |
| 8 | 8697532008 |
| 9 | 246819113442 |
| 10 | 7660379273261 |
| 11 | 258275171344333 |
| 12 | 9403520522325228 |
| 13 | 367786323703199388 |
| 14 | 15381080863799688012 |
| 15 | 684987041358431417024 |
| 16 | 32366520461834117146792 |