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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 14 |
| 6 | 32 |
| 7 | 79 |
| 8 | 203 |
| 9 | 541 |
| 10 | 1495 |
| 11 | 4267 |
| 12 | 12543 |
| 13 | 37902 |
| 14 | 117519 |
| 15 | 373236 |
| 16 | 1212418 |
| 17 | 4023007 |
| 18 | 13619993 |
| 19 | 46998318 |
| 20 | 165144243 |
| 21 | 590411905 |
| 22 | 2145978422 |
| 23 | 7924484313 |
| 24 | 29710783080 |
| 25 | 113031311232 |
| 26 | 436102652463 |
| 27 | 1705552475812 |
| 28 | 6758097531570 |
| 29 | 27119230158894 |