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 | 36 |
| 2 | 4150 |
| 3 | 699252 |
| 4 | 134223976 |
| 5 | 27487816992 |
| 6 | 5864063066500 |
| 7 | 1286742755471400 |
| 8 | 288230376353050816 |
| 9 | 65588423374144427520 |
| 10 | 15111572745224096425720 |
| 11 | 3516875111606393874082104 |
| 12 | 825293359523595646117352176 |
| 13 | 195023169265881489687952047216 |