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 | 0 |
| 1 | 1 |
| 2 | 1073741824 |
| 3 | 205891132094649 |
| 4 | 1152921504606846976 |
| 5 | 931322574615478515625 |
| 6 | 221073919720733357899776 |
| 7 | 22539340290692258087863249 |
| 8 | 1237940039285380274899124224 |