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 | -288 |
| 3 | -128844 |
| 4 | -2014208 |
| 5 | 21640950 |
| 6 | 37107072 |
| 7 | -768078808 |
| 8 | 1184071680 |
| 9 | 6140423133 |
| 10 | -6232593600 |
| 11 | -94724929188 |
| 12 | 259518615552 |
| 13 | -80621789794 |
| 14 | 221206696704 |
| 15 | -2788306561800 |
| 16 | 3883087691776 |
| 17 | 3052282930002 |