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) |
|---|---|
| 2 | -1 |
| 3 | -11 |
| 4 | 2 |
| 5 | -114 |
| 6 | 29 |
| 7 | -2 |
| 8 | -3963 |
| 9 | 1156 |
| 10 | -122 |
| 11 | 4 |
| 12 | -104745 |
| 13 | 32863 |
| 14 | -4206 |
| 15 | 222 |
| 16 | -4 |
| 17 | -3926745 |
| 18 | 1287813 |
| 19 | -184279 |
| 20 | 12198 |
| 21 | -366 |
| 22 | 4 |
| 23 | -198491580 |
| 24 | 67029582 |
| 25 | -10317484 |
| 26 | 781981 |
| 27 | -30132 |
| 28 | 562 |
| 29 | -4 |