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 | 129 |
| 3 | 280065 |
| 4 | 4586751489 |
| 5 | 358322666751489 |
| 6 | 100306488365546751489 |
| 7 | 82606511560391889386751489 |
| 8 | 173238283180457843219993066751489 |
| 9 | 828593116199250458889895450218986751489 |