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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 5 |
| 9 | 8 |
| 10 | 13 |
| 11 | 26 |
| 12 | 47 |
| 13 | 86 |
| 14 | 159 |
| 15 | 292 |
| 16 | 584 |
| 17 | 1121 |
| 18 | 2156 |
| 19 | 4153 |
| 20 | 8014 |
| 21 | 16028 |
| 22 | 31472 |
| 23 | 61823 |
| 24 | 121490 |
| 25 | 238827 |
| 26 | 477654 |
| 27 | 947294 |
| 28 | 1878560 |
| 29 | 3725648 |
| 30 | 7389473 |
| 31 | 14900436 |
| 32 | 29796719 |
| 33 | 59593438 |
| 34 | 119178862 |
| 35 | 238341696 |
| 36 | 482287600 |
| 37 | 970054641 |
| 38 | 1951222247 |
| 39 | 3924973230 |