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 | 48 |
| 2 | 2256 |
| 3 | 104904 |
| 4 | 4877472 |
| 5 | 226750560 |
| 6 | 10541488248 |
| 7 | 490066437936 |
| 8 | 22782847249104 |
| 9 | 1059158680807752 |
| 10 | 49239548471206560 |
| 11 | 2289112271116376928 |
| 12 | 106419233167075660536 |
| 13 | 4947355938259459431984 |
| 14 | 229999127520543810796752 |