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 | 4 |
| 2 | 8 |
| 3 | 2048 |
| 4 | 34359738368 |
| 5 | 2361183241434822606848 |
| 6 | 3138550867693340381917894711603833208051177722232017256448 |