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 | 4900 |
| 3 | 513590 |
| 4 | 333833500 |
| 5 | 711410700 |
| 6 | 1042716675 |
| 7 | 1429018500 |
| 8 | 26088481055 |
| 9 | 62366724420 |
| 10 | 5223660842400 |
| 11 | 18289944673000 |