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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 8 |
| 7 | 15 |
| 8 | 27 |
| 9 | 48 |
| 10 | 84 |
| 11 | 145 |
| 12 | 248 |
| 13 | 421 |
| 14 | 710 |
| 15 | 1191 |
| 16 | 1989 |
| 17 | 3309 |
| 18 | 5487 |
| 19 | 9073 |
| 20 | 14966 |
| 21 | 24634 |
| 22 | 40472 |
| 23 | 66384 |
| 24 | 108729 |
| 25 | 177858 |
| 26 | 290610 |
| 27 | 474364 |
| 28 | 773615 |
| 29 | 1260643 |
| 30 | 2052818 |
| 31 | 3340662 |
| 32 | 5433345 |
| 33 | 8832432 |
| 34 | 14351403 |
| 35 | 23309326 |
| 36 | 37844645 |
| 37 | 61423513 |
| 38 | 99663191 |
| 39 | 161665653 |