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 | 2 |
| 2 | -334 |
| 3 | -2020 |
| 4 | 334636 |
| 5 | 3400312 |
| 6 | -558734216 |
| 7 | -8013301168 |
| 8 | 1305938552720 |
| 9 | 24279843463712 |
| 10 | -3924105390446816 |
| 11 | -89914081688240192 |
| 12 | 14409995678304781504 |
| 13 | 393511506684111781760 |
| 14 | -62530497997102986365056 |
| 15 | -1987157445623422924018432 |
| 16 | 313055309954065295022797056 |