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 | 16 |
| 1 | 185 |
| 2 | 2181 |
| 3 | 26860 |
| 4 | 342968 |
| 5 | 4504944 |
| 6 | 60509296 |
| 7 | 827456576 |
| 8 | 11482655232 |
| 9 | 161302619392 |
| 10 | 2289365653760 |
| 11 | 32780329073664 |
| 12 | 472951175022592 |
| 13 | 6869148315201536 |
| 14 | 100352220112662528 |
| 15 | 1473672361011920896 |