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 | 50625 |
| 2 | 2480625 |
| 3 | 121550625 |
| 4 | 2647102500 |
| 5 | 57648010000 |
| 6 | 747118209600 |
| 7 | 9682651996416 |
| 8 | 87143867967744 |
| 9 | 784294811709696 |
| 10 | 5379800012294400 |
| 11 | 36902256320160000 |
| 12 | 205033454758440000 |
| 13 | 1139190980775210000 |