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 | 1 |
| 3 | 2 |
| 4 | 9 |
| 5 | 793 |
| 6 | 499208698 |
| 7 | 124407462491481058208408441 |
| 8 | 1925481259009966865844002992692350885969632796673886663638811207308483184039785 |