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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 16 |
| 3 | 512 |
| 4 | 38416 |
| 5 | 7962624 |
| 6 | 4096000000 |
| 7 | 4398046511104 |
| 8 | 10000000000000000 |
| 9 | 48717667557975775744 |
| 10 | 451730952053751361306624 |
| 11 | 7982572438812891719395180544 |
| 12 | 268637376395543538746286686601216 |
| 13 | 16132732437821617561429013924830773248 |