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 | 4225 |
| 2 | 30625 |
| 3 | 330625 |
| 4 | 422500 |
| 5 | 3062500 |
| 6 | 4515625 |
| 7 | 33062500 |
| 8 | 42250000 |
| 9 | 306250000 |
| 10 | 451562500 |
| 11 | 953265625 |
| 12 | 3306250000 |
| 13 | 4225000000 |
| 14 | 30625000000 |
| 15 | 39451890625 |
| 16 | 45156250000 |
| 17 | 95326562500 |
| 18 | 282891015625 |
| 19 | 330625000000 |
| 20 | 422500000000 |
| 21 | 3062500000000 |
| 22 | 3560297265625 |