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 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 14 |
| 6 | 32 |
| 7 | 79 |
| 8 | 193 |
| 9 | 499 |
| 10 | 1321 |
| 11 | 3626 |
| 12 | 10275 |
| 13 | 30126 |
| 14 | 91062 |
| 15 | 284093 |
| 16 | 912866 |
| 17 | 3018825 |
| 18 | 10261530 |
| 19 | 35814255 |
| 20 | 128197595 |
| 21 | 470146011 |
| 22 | 1764737593 |
| 23 | 6773539331 |
| 24 | 26561971320 |
| 25 | 106330997834 |
| 26 | 434195908353 |
| 27 | 1807306022645 |
| 28 | 7663255717310 |
| 29 | 33079998762373 |