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 | 65 |
| 4 | 781 |
| 5 | 11529 |
| 6 | 201811 |
| 7 | 4085185 |
| 8 | 93864121 |
| 9 | 2413042577 |
| 10 | 68618940391 |
| 11 | 2138428376721 |
| 12 | 72470493235141 |
| 13 | 2653457921150425 |
| 14 | 104382202543721467 |
| 15 | 4390455017903519489 |
| 16 | 196621779843659466481 |
| 17 | 9340717969198079777313 |