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 | 8 |
| 3 | -127 |
| 4 | 3523 |
| 5 | -146964 |
| 6 | 8538477 |
| 7 | -655457233 |
| 8 | 63974756924 |
| 9 | -7713566822979 |
| 10 | 1123255462229507 |
| 11 | -193995005614903728 |
| 12 | 39147722262966666217 |
| 13 | -9115873617718182207793 |
| 14 | 2423565558533387761866928 |
| 15 | -728969374928760685473620951 |
| 16 | 246100624914698937364249220851 |