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 | 2 |
| 2 | 6 |
| 3 | 15 |
| 4 | 37 |
| 5 | 85 |
| 6 | 194 |
| 7 | 423 |
| 8 | 912 |
| 9 | 1917 |
| 10 | 3974 |
| 11 | 8096 |
| 12 | 16302 |
| 13 | 32382 |
| 14 | 63668 |
| 15 | 123851 |
| 16 | 238756 |
| 17 | 456190 |
| 18 | 864821 |
| 19 | 1627016 |
| 20 | 3039845 |
| 21 | 5641884 |
| 22 | 10406924 |
| 23 | 19083836 |
| 24 | 34802782 |
| 25 | 63135539 |
| 26 | 113965033 |
| 27 | 204739662 |
| 28 | 366156396 |
| 29 | 652001918 |
| 30 | 1156200929 |
| 31 | 2042173379 |
| 32 | 3593341512 |