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 | 22 |
| 2 | -1198 |
| 3 | -100364 |
| 4 | 3837100 |
| 5 | 759665192 |
| 6 | -15557376776 |
| 7 | -8008803406736 |
| 8 | 6978879212432 |
| 9 | 107919993983713120 |
| 10 | 2268593594123893024 |
| 11 | -1765305239735329031872 |
| 12 | -80810233952657507431232 |
| 13 | 33853095811859416015817344 |
| 14 | 2511764683469716209839300480 |