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 | 17 |
| 3 | 4433 |
| 4 | 18245201 |
| 5 | 1197172898385 |
| 6 | 1255709588423576145 |
| 7 | 21068918017101222558779985 |
| 8 | 5655752483351603939678821837720145 |
| 9 | 24291387778773301588924456932322615789898321 |