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 | 1 |
| 1 | 6 |
| 2 | 60 |
| 3 | 1368 |
| 4 | 15552 |
| 5 | 201240 |
| 6 | 2016432 |
| 7 | 21582624 |
| 8 | 201060768 |
| 9 | 1944012744 |
| 10 | 17257455960 |
| 11 | 156760071600 |
| 12 | 1346073913440 |
| 13 | 11734199738820 |
| 14 | 98420246759688 |