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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 10 |
| 6 | 18 |
| 7 | 31 |
| 8 | 55 |
| 9 | 98 |
| 10 | 174 |
| 11 | 306 |
| 12 | 542 |
| 13 | 956 |
| 14 | 1690 |
| 15 | 2983 |
| 16 | 5271 |
| 17 | 9310 |
| 18 | 16448 |
| 19 | 29050 |
| 20 | 51318 |
| 21 | 90644 |
| 22 | 160118 |
| 23 | 282826 |
| 24 | 499590 |
| 25 | 882468 |
| 26 | 1558798 |
| 27 | 2753448 |
| 28 | 4863696 |
| 29 | 8591212 |
| 30 | 15175514 |
| 31 | 26805983 |
| 32 | 47350055 |
| 33 | 83639030 |
| 34 | 147739848 |
| 35 | 260967362 |
| 36 | 460972286 |
| 37 | 814260544 |
| 38 | 1438308328 |