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 | -54 |
| 2 | -5022 |
| 3 | -3259116 |
| 4 | -1012953978 |
| 5 | -479848911192 |
| 6 | -201506019745716 |
| 7 | -93655132040105136 |
| 8 | -43096009052844972522 |
| 9 | -20449878102745826555178 |
| 10 | -9772372681245342509703768 |
| 11 | -4732826670479844302345499132 |
| 12 | -2309711500786845517082643561660 |