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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 16 |
| 5 | 128 |
| 6 | 4096 |
| 7 | 1048576 |
| 8 | 8589934592 |
| 9 | 18014398509481984 |
| 10 | 309485009821345068724781056 |
| 11 | 11150372599265311570767859136324180752990208 |