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) |
|---|---|
| 1 | 1 |
| 2 | -8 |
| 3 | 1 |
| 4 | 128 |
| 5 | -24 |
| 6 | 1 |
| 7 | -3072 |
| 8 | 704 |
| 9 | -48 |
| 10 | 1 |
| 11 | 98304 |
| 12 | -25600 |
| 13 | 2240 |
| 14 | -80 |
| 15 | 1 |
| 16 | -3932160 |
| 17 | 1122304 |
| 18 | -115200 |
| 19 | 5440 |
| 20 | -120 |
| 21 | 1 |
| 22 | 188743680 |
| 23 | -57802752 |
| 24 | 6651904 |
| 25 | -376320 |
| 26 | 11200 |
| 27 | -168 |
| 28 | 1 |
| 29 | -10569646080 |
| 30 | 3425697792 |
| 31 | -430309376 |
| 32 | 27725824 |
| 33 | -1003520 |
| 34 | 20608 |
| 35 | -224 |
| 36 | 1 |