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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 25 |
| 6 | 57 |
| 7 | 124 |
| 8 | 268 |
| 9 | 588 |
| 10 | 1285 |
| 11 | 2801 |
| 12 | 6118 |
| 13 | 13362 |
| 14 | 29168 |
| 15 | 63685 |
| 16 | 139057 |
| 17 | 303608 |
| 18 | 662888 |
| 19 | 1447352 |
| 20 | 3160121 |
| 21 | 6899745 |
| 22 | 15064810 |
| 23 | 32892270 |
| 24 | 71816436 |
| 25 | 156802881 |
| 26 | 342360937 |
| 27 | 747505396 |
| 28 | 1632091412 |
| 29 | 3563482500 |
| 30 | 7780451037 |
| 31 | 16987713169 |
| 32 | 37090703118 |
| 33 | 80983251898 |