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 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 6 |
| 7 | 8 |
| 8 | 12 |
| 9 | 17 |
| 10 | 27 |
| 11 | 41 |
| 12 | 67 |
| 13 | 109 |
| 14 | 187 |
| 15 | 319 |
| 16 | 568 |
| 17 | 1013 |
| 18 | 1855 |
| 19 | 3416 |
| 20 | 6404 |
| 21 | 12075 |
| 22 | 23056 |
| 23 | 44265 |
| 24 | 85737 |
| 25 | 166918 |
| 26 | 327094 |
| 27 | 643843 |
| 28 | 1273776 |
| 29 | 2529846 |
| 30 | 5045015 |
| 31 | 10094831 |
| 32 | 20267469 |
| 33 | 40811048 |
| 34 | 82413473 |
| 35 | 166854359 |
| 36 | 338648851 |
| 37 | 688887026 |
| 38 | 1404384063 |
| 39 | 2868791176 |
| 40 | 5871429462 |
| 41 | 12038444069 |