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 | -196632 |
| 3 | -38263776 |
| 4 | -1610809368 |
| 5 | -29296875024 |
| 6 | -313495116768 |
| 7 | -2325336249792 |
| 8 | -13195750342680 |
| 9 | -61004818143672 |
| 10 | -240029297071632 |
| 11 | -828545091454368 |
| 12 | -2568152034827232 |
| 13 | -7269002558214096 |
| 14 | -19051479894545856 |
| 15 | -46708710975763776 |