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 | 641 |
| 2 | 114689 |
| 3 | 167772161 |
| 4 | 6597069766657 |
| 5 | 188894659314785808547841 |
| 6 | 850705917302346158658436518579420528641 |
| 7 | 2468256835981809063232453773836025757474103798450369795022913537 |