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 | 3 |
| 3 | 127 |
| 4 | 1361953 |
| 5 | 14961046326601 |
| 6 | 433366367372593816560481 |
| 7 | 74029504174329565838647515081008812321 |
| 8 | 147684970947386323832216294475743896349724799651361817601 |