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 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 14 |
| 6 | 32 |
| 7 | 74 |
| 8 | 180 |
| 9 | 457 |
| 10 | 1195 |
| 11 | 3177 |
| 12 | 8526 |
| 13 | 23018 |
| 14 | 62441 |
| 15 | 170153 |
| 16 | 465791 |
| 17 | 1280956 |
| 18 | 3538618 |
| 19 | 9817619 |
| 20 | 27348480 |
| 21 | 76467497 |
| 22 | 214532805 |
| 23 | 603732396 |
| 24 | 1703728554 |
| 25 | 4819990947 |
| 26 | 13667248631 |
| 27 | 38834528740 |
| 28 | 110556072877 |
| 29 | 315290709729 |
| 30 | 900635841754 |
| 31 | 2576615923655 |
| 32 | 7381956798465 |
| 33 | 21177682172332 |
| 34 | 60832837964492 |