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 | 3 |
| 3 | 4 |
| 4 | 17 |
| 5 | 27 |
| 6 | 76 |
| 7 | 220 |
| 8 | 747 |
| 9 | 2232 |
| 10 | 5719 |
| 11 | 18980 |
| 12 | 159340 |
| 13 | 437580 |
| 14 | 1672307 |
| 15 | 10891075 |
| 16 | 78604064 |