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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 12 |
| 6 | 9 |
| 7 | 46 |
| 8 | 119 |
| 9 | 120 |
| 10 | 122 |
| 11 | 597 |
| 12 | 828 |
| 13 | 2035 |
| 14 | 4449 |
| 15 | 6554 |
| 16 | 239 |
| 17 | 28560 |
| 18 | 56403 |
| 19 | 86158 |
| 20 | 145668 |
| 21 | 341525 |
| 22 | 246046 |
| 23 | 1315911 |
| 24 | 3369960 |
| 25 | 3455641 |
| 26 | 3627003 |
| 27 | 17021162 |
| 28 | 23161315 |
| 29 | 58317492 |
| 30 | 128629846 |
| 31 | 186118929 |
| 32 | 13651680 |
| 33 | 815616479 |
| 34 | 1590277918 |
| 35 | 2474152797 |
| 36 | 4241902555 |
| 37 | 9719139348 |
| 38 | 6712571031 |
| 39 | 37641223154 |
| 40 | 95420159401 |
| 41 | 99498527400 |
| 42 | 107655263398 |
| 43 | 485257533003 |