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 | 4 |
| 2 | 4 |
| 3 | 16 |
| 4 | 64 |
| 5 | 1024 |
| 6 | 65536 |
| 7 | 67108864 |
| 8 | 4398046511104 |
| 9 | 295147905179352825856 |
| 10 | 1298074214633706907132624082305024 |
| 11 | 383123885216472214589586756787577295904684780545900544 |