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 | 1 |
| 2 | 5 |
| 3 | 161 |
| 4 | 6989 |
| 5 | 889769 |
| 6 | 145034861 |
| 7 | 42816875729 |
| 8 | 15196271678069 |
| 9 | 8132911703794601 |
| 10 | 6790008314246422541 |
| 11 | 6567054920481119894801 |
| 12 | 8950073675937467308565669 |
| 13 | 15100141203716305943432625689 |