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 | -1 |
| 2 | -999 |
| 3 | -996001 |
| 4 | -989010999 |
| 5 | -974065974001 |
| 6 | -943301698056999 |
| 7 | -881188585190880001 |
| 8 | -757277396614707246999 |
| 9 | -512519922101780607498001 |
| 10 | -34386117044101144161012999 |