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 | 2 |
| 1 | 3 |
| 2 | -24 |
| 3 | -81 |
| 4 | 160 |
| 5 | 1215 |
| 6 | -896 |
| 7 | -15309 |
| 8 | 4608 |
| 9 | 177147 |
| 10 | -22528 |
| 11 | -1948617 |
| 12 | 106496 |
| 13 | 20726199 |
| 14 | -491520 |
| 15 | -215233605 |
| 16 | 2228224 |
| 17 | 2195382771 |
| 18 | -9961472 |
| 19 | -22082967873 |
| 20 | 44040192 |
| 21 | 219667417263 |
| 22 | -192937984 |
| 23 | -2165293113021 |
| 24 | 838860800 |