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) |
|---|---|
| 1 | -4 |
| 2 | -3 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 3 |
| 7 | 5 |
| 8 | 11 |
| 9 | 15 |
| 10 | 28 |
| 11 | 47 |
| 12 | 55 |
| 13 | 81 |
| 14 | 549 |
| 15 | 1799 |
| 16 | 8361 |