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 | 3 |
| 3 | 7 |
| 4 | 18 |
| 5 | 40 |
| 6 | 97 |
| 7 | 216 |
| 8 | 499 |
| 9 | 1112 |
| 10 | 2502 |
| 11 | 5503 |
| 12 | 12197 |
| 13 | 26582 |
| 14 | 58088 |
| 15 | 125619 |
| 16 | 271713 |
| 17 | 583228 |
| 18 | 1251115 |
| 19 | 2668651 |
| 20 | 5685053 |
| 21 | 12059993 |
| 22 | 25544291 |
| 23 | 53926003 |
| 24 | 113666195 |
| 25 | 238946232 |
| 26 | 501546514 |
| 27 | 1050430420 |
| 28 | 2196869731 |
| 29 | 4586021745 |
| 30 | 9560876381 |
| 31 | 19900839742 |
| 32 | 41373446190 |