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 | 2 |
| 2 | 128 |
| 3 | 17496 |
| 4 | 4194304 |
| 5 | 1562500000 |
| 6 | 835884417024 |
| 7 | 607687873272704 |
| 8 | 576460752303423488 |
| 9 | 691636079448571949568 |
| 10 | 1024000000000000000000000 |
| 11 | 1833841138186726138360895488 |
| 12 | 3907429033741066770846918377472 |
| 13 | 9769232732262334599652925506494464 |