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 | 3 |
| 3 | 6 |
| 4 | 11 |
| 5 | 20 |
| 6 | 36 |
| 7 | 66 |
| 8 | 121 |
| 9 | 222 |
| 10 | 405 |
| 11 | 738 |
| 12 | 1346 |
| 13 | 2453 |
| 14 | 4472 |
| 15 | 8153 |
| 16 | 14863 |
| 17 | 27093 |
| 18 | 49388 |
| 19 | 90029 |
| 20 | 164112 |
| 21 | 299156 |
| 22 | 545324 |
| 23 | 994058 |
| 24 | 1812045 |
| 25 | 3303133 |
| 26 | 6021201 |
| 27 | 10975901 |
| 28 | 20007704 |
| 29 | 36471557 |
| 30 | 66483113 |
| 31 | 121190448 |
| 32 | 220915119 |
| 33 | 402700792 |