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 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 9 |
| 6 | 17 |
| 7 | 28 |
| 8 | 50 |
| 9 | 85 |
| 10 | 149 |
| 11 | 257 |
| 12 | 448 |
| 13 | 775 |
| 14 | 1347 |
| 15 | 2336 |
| 16 | 4057 |
| 17 | 7038 |
| 18 | 12219 |
| 19 | 21204 |
| 20 | 36807 |
| 21 | 63880 |
| 22 | 110878 |
| 23 | 192442 |
| 24 | 334020 |
| 25 | 579739 |
| 26 | 1006237 |
| 27 | 1746482 |
| 28 | 3031310 |
| 29 | 5261324 |
| 30 | 9131892 |
| 31 | 15849876 |
| 32 | 27510049 |
| 33 | 47748159 |
| 34 | 82874713 |
| 35 | 143842547 |
| 36 | 249662173 |
| 37 | 433329337 |
| 38 | 752113633 |
| 39 | 1305415658 |
| 40 | 2265761441 |