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 | 3 |
| 3 | 112 |
| 4 | 85035 |
| 5 | 3451956516 |
| 6 | 7575106427737240 |
| 7 | 2031241364747667201263520 |
| 8 | 57096186419355436503540544000542003 |
| 9 | 350680349722258761627197454626353435730368352560 |