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 | 4 |
| 3 | 36 |
| 4 | 576 |
| 5 | 14400 |
| 6 | 705600 |
| 7 | 57153600 |
| 8 | 6915585600 |
| 9 | 1168733966400 |
| 10 | 337764116289600 |
| 11 | 121932845980545600 |
| 12 | 64502475523708622400 |
| 13 | 40314047202317889000000 |
| 14 | 33904113697149344649000000 |
| 15 | 32581853262960520207689000000 |
| 16 | 44604557116992952164326241000000 |
| 17 | 74980260513665152588232411121000000 |