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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 11 |
| 12 | 22 |
| 13 | 33 |
| 14 | 66 |
| 15 | 99 |
| 16 | 363 |
| 17 | 858 |
| 18 | 1441 |
| 19 | 2882 |
| 20 | 5445 |
| 21 | 6886 |
| 22 | 9449 |
| 23 | 15951 |
| 24 | 19891 |
| 25 | 21012 |
| 26 | 29692 |
| 27 | 32223 |
| 28 | 54945 |
| 29 | 369963 |
| 30 | 477774 |
| 31 | 564465 |
| 32 | 585585 |
| 33 | 609906 |
| 34 | 672276 |
| 35 | 717717 |
| 36 | 780087 |
| 37 | 804408 |
| 38 | 912219 |
| 39 | 1251521 |
| 40 | 2639362 |
| 41 | 3825283 |