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 | 9 |
| 4 | 24 |
| 5 | 50 |
| 6 | 102 |
| 7 | 210 |
| 8 | 424 |
| 9 | 837 |
| 10 | 1630 |
| 11 | 3146 |
| 12 | 6024 |
| 13 | 11453 |
| 14 | 21644 |
| 15 | 40695 |
| 16 | 76176 |
| 17 | 142035 |
| 18 | 263916 |
| 19 | 488870 |
| 20 | 903060 |
| 21 | 1663998 |
| 22 | 3059166 |
| 23 | 5612483 |
| 24 | 10277448 |
| 25 | 18787150 |
| 26 | 34287916 |
| 27 | 62485371 |
| 28 | 113715448 |
| 29 | 206683725 |
| 30 | 375211710 |
| 31 | 680399005 |
| 32 | 1232533696 |
| 33 | 2230537914 |