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 | -2 |
| 2 | -4 |
| 3 | -9 |
| 4 | -29 |
| 5 | -85 |
| 6 | -311 |
| 7 | -1549 |
| 8 | -9851 |
| 9 | -74587 |
| 10 | -956633 |