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 | -48 |
| 2 | -216 |
| 3 | 1536 |
| 4 | -1560 |
| 5 | -3024 |
| 6 | 13824 |
| 7 | -8736 |
| 8 | -14040 |
| 9 | 41712 |
| 10 | -27216 |
| 11 | -31968 |
| 12 | 112128 |
| 13 | -51072 |
| 14 | -74304 |
| 15 | 193536 |
| 16 | -113880 |
| 17 | -117936 |
| 18 | 375408 |
| 19 | -165984 |
| 20 | -220752 |
| 21 | 528384 |
| 22 | -287712 |
| 23 | -292032 |
| 24 | 898560 |
| 25 | -375024 |
| 26 | -474768 |
| 27 | 1126464 |
| 28 | -598848 |
| 29 | -585360 |
| 30 | 1741824 |
| 31 | -722400 |
| 32 | -898776 |