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 | 0 |
| 2 | -2 |
| 3 | 117 |
| 4 | -9634 |
| 5 | 12625 |
| 6 | 6612982405 |
| 7 | -59596651685928 |
| 8 | 718060704631041758 |
| 9 | 93531932148176228605941 |
| 10 | -94958916373783601251815537977 |
| 11 | 135510731474135489426391897083350463 |