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 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 28 |
| 7 | 51 |
| 8 | 93 |
| 9 | 168 |
| 10 | 304 |
| 11 | 550 |
| 12 | 995 |
| 13 | 1799 |
| 14 | 3253 |
| 15 | 5882 |
| 16 | 10635 |
| 17 | 19229 |
| 18 | 34767 |
| 19 | 62861 |
| 20 | 113656 |
| 21 | 205497 |
| 22 | 371550 |
| 23 | 671782 |
| 24 | 1214618 |
| 25 | 2196094 |
| 26 | 3970654 |
| 27 | 7179153 |
| 28 | 12980288 |
| 29 | 23469047 |
| 30 | 42433278 |
| 31 | 76721609 |
| 32 | 138716724 |
| 33 | 250807167 |
| 34 | 453472612 |
| 35 | 819902445 |
| 36 | 1482426947 |
| 37 | 2680306255 |
| 38 | 4846135343 |