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 | -6 |
| 3 | -180 |
| 4 | -4200 |
| 5 | -117600 |
| 6 | -3969000 |
| 7 | -115259760 |
| 8 | -3030051024 |
| 9 | -106051785840 |
| 10 | -3363975014400 |
| 11 | -98227319533200 |
| 12 | -3110531785218000 |
| 13 | -103492384705710000 |
| 14 | -3211851661880141280 |
| 15 | -96355549856404238400 |
| 16 | -3303308595002047632000 |
| 17 | -106681852579497947388000 |