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 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 6 |
| 6 | 14 |
| 7 | 26 |
| 8 | 54 |
| 9 | 105 |
| 10 | 213 |
| 11 | 423 |
| 12 | 849 |
| 13 | 1697 |
| 14 | 3399 |
| 15 | 6799 |
| 16 | 13608 |
| 17 | 27220 |
| 18 | 54451 |
| 19 | 108901 |
| 20 | 217789 |
| 21 | 435517 |
| 22 | 870892 |
| 23 | 1741467 |
| 24 | 3482322 |
| 25 | 6963512 |
| 26 | 13925078 |
| 27 | 27846979 |
| 28 | 55689150 |
| 29 | 111371677 |
| 30 | 222735709 |
| 31 | 445466058 |
| 32 | 890938357 |
| 33 | 1781916885 |
| 34 | 3563957177 |
| 35 | 7128223846 |