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 | 45 |
| 2 | 60 |
| 3 | 54600 |
| 4 | 257040 |
| 5 | 1801800 |
| 6 | 2789640 |
| 7 | 4299750 |
| 8 | 47297250 |
| 9 | 1707259680 |
| 10 | 4093362000 |