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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 2 |
| 9 | 3 |
| 10 | 5 |
| 11 | 8 |
| 12 | 24 |
| 13 | 43 |
| 14 | 67 |
| 15 | 121 |
| 16 | 188 |
| 17 | 409 |
| 18 | 708 |
| 19 | 1228 |
| 20 | 1946 |
| 21 | 4131 |
| 22 | 6241 |
| 23 | 10525 |
| 24 | 17866 |
| 25 | 29428 |
| 26 | 58369 |
| 27 | 87881 |
| 28 | 156261 |
| 29 | 255242 |
| 30 | 412545 |
| 31 | 767846 |
| 32 | 1280460 |
| 33 | 2059307 |
| 34 | 3343656 |
| 35 | 5510186 |
| 36 | 9861418 |
| 37 | 16472261 |
| 38 | 26422596 |
| 39 | 43917688 |
| 40 | 73697381 |
| 41 | 125281166 |
| 42 | 206655249 |