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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 24 |
| 6 | 55 |
| 7 | 128 |
| 8 | 300 |
| 9 | 700 |
| 10 | 1632 |
| 11 | 3809 |
| 12 | 8890 |
| 13 | 20744 |
| 14 | 48406 |
| 15 | 112960 |
| 16 | 263599 |
| 17 | 615120 |
| 18 | 1435416 |
| 19 | 3349624 |
| 20 | 7816528 |
| 21 | 18240289 |
| 22 | 42564706 |
| 23 | 99327052 |
| 24 | 231785058 |
| 25 | 540883000 |
| 26 | 1262179815 |
| 27 | 2945365040 |
| 28 | 6873169028 |
| 29 | 16038912628 |