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 | -213720 |
| 2 | 114432 |
| 3 | -548352 |
| 4 | 892800 |
| 5 | -1774080 |
| 6 | -7289856 |
| 7 | 10105344 |
| 8 | -79557120 |
| 9 | -97790976 |
| 10 | 171740160 |
| 11 | 147556224 |
| 12 | 56531520 |
| 13 | -380053440 |
| 14 | 122206464 |
| 15 | -164292480 |
| 16 | -958000320 |
| 17 | 394761600 |
| 18 | 189907200 |
| 19 | 1139760000 |
| 20 | -3023127360 |
| 21 | -1495428480 |
| 22 | -4260988800 |
| 23 | -14501393280 |
| 24 | 7022695680 |