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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 10 |
| 6 | 17 |
| 7 | 50 |
| 8 | 170 |
| 9 | 184 |
| 10 | 194 |
| 11 | 209 |
| 12 | 641 |
| 13 | 1298 |
| 14 | 4034 |
| 15 | 5956 |
| 16 | 7154 |
| 17 | 9970 |
| 18 | 35956 |
| 19 | 42730 |
| 20 | 132004 |
| 21 | 190610 |