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 | -11 |
| 2 | -118 |
| 3 | -1473 |
| 4 | -23635 |
| 5 | -434861 |
| 6 | -8659573 |
| 7 | -181387821 |
| 8 | -3936961298 |
| 9 | -87743843970 |
| 10 | -1996149058302 |
| 11 | -46163368994680 |
| 12 | -1082012001849499 |
| 13 | -25646334881233711 |
| 14 | -613664275728573585 |
| 15 | -14803437882920457712 |
| 16 | -359626550280367615329 |