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 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 289 |
| 4 | 63487 |
| 5 | 69711361 |
| 6 | 367404658687 |
| 7 | 9036285693861889 |
| 8 | 1015983915928423497727 |
| 9 | 514039127264534042076119041 |
| 10 | 1155907276780291114251550828003327 |
| 11 | 11436746463485293365165228859824053157889 |
| 12 | 493776641438913029616304251647570171691844763647 |