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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 9 |
| 7 | 19 |
| 8 | 43 |
| 9 | 99 |
| 10 | 235 |
| 11 | 562 |
| 12 | 1370 |
| 13 | 3369 |
| 14 | 8380 |
| 15 | 21000 |
| 16 | 53038 |
| 17 | 134759 |
| 18 | 344390 |
| 19 | 884376 |
| 20 | 2281274 |
| 21 | 5907791 |
| 22 | 15354795 |
| 23 | 40037979 |
| 24 | 104712010 |
| 25 | 274600650 |
| 26 | 721931534 |
| 27 | 1902362100 |
| 28 | 5023654075 |
| 29 | 13292543205 |
| 30 | 35237009037 |
| 31 | 93570419556 |
| 32 | 248873359877 |
| 33 | 662940466647 |