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 | 24 |
| 2 | -1106 |
| 3 | -107280 |
| 4 | 3006156 |
| 5 | 793927584 |
| 6 | -6227509944 |
| 7 | -8161777416384 |
| 8 | -122559955912560 |
| 9 | 106883437972961664 |
| 10 | 4420515123955413216 |
| 11 | -1691687063730285271296 |
| 12 | -122388860352949901833536 |
| 13 | 31207679045861280271833600 |
| 14 | 3425139117578273280016104576 |