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 | 6 |
| 3 | 477 |
| 4 | 11231586 |
| 5 | 17656351387745509 |
| 6 | 118547604486270210927391203275078974 |
| 7 | 14557702344245589436016960628730576845591277100880695377777962217288601549 |