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 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 9 |
| 6 | 15 |
| 7 | 30 |
| 8 | 54 |
| 9 | 97 |
| 10 | 189 |
| 11 | 360 |
| 12 | 675 |
| 13 | 1304 |
| 14 | 2522 |
| 15 | 4835 |
| 16 | 9358 |
| 17 | 18193 |
| 18 | 35269 |
| 19 | 68568 |
| 20 | 133737 |
| 21 | 260802 |
| 22 | 509132 |
| 23 | 995801 |
| 24 | 1948931 |
| 25 | 3816904 |
| 26 | 7483636 |
| 27 | 14683721 |
| 28 | 28827798 |
| 29 | 56637969 |
| 30 | 111347879 |
| 31 | 219019294 |
| 32 | 431043814 |
| 33 | 848764585 |
| 34 | 1672056525 |
| 35 | 3295390800 |
| 36 | 6497536449 |