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 | 1 |
| 2 | 121 |
| 3 | 5611 |
| 4 | 193721 |
| 5 | 6050000 |
| 6 | 183990301 |
| 7 | 5598183221 |
| 8 | 171567260161 |
| 9 | 5290933752571 |
| 10 | 163756656800000 |
| 11 | 5076226921767101 |
| 12 | 157423577321804321 |
| 13 | 4881873153941565211 |
| 14 | 151371085451034210421 |
| 15 | 4692977668021522550000 |
| 16 | 145487069742178319930401 |