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 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 6 |
| 6 | 12 |
| 7 | 28 |
| 8 | 56 |
| 9 | 119 |
| 10 | 236 |
| 11 | 481 |
| 12 | 950 |
| 13 | 1902 |
| 14 | 3752 |
| 15 | 7450 |
| 16 | 14684 |
| 17 | 29032 |
| 18 | 57192 |
| 19 | 112850 |
| 20 | 222308 |
| 21 | 438359 |
| 22 | 863808 |
| 23 | 1703239 |
| 24 | 3357766 |
| 25 | 6622471 |
| 26 | 13061980 |
| 27 | 25772503 |
| 28 | 50859826 |
| 29 | 100399602 |
| 30 | 198235896 |
| 31 | 391523612 |
| 32 | 773453896 |
| 33 | 1528361734 |
| 34 | 3020781528 |
| 35 | 5971996960 |