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 | 1 |
| 3 | 3 |
| 4 | 1 |
| 5 | 8 |
| 6 | 13 |
| 7 | 13 |
| 8 | 54 |
| 9 | 132 |
| 10 | 280 |
| 11 | 547 |
| 12 | 1219 |
| 13 | 3904 |
| 14 | 11107 |
| 15 | 25082 |
| 16 | 53777 |
| 17 | 137751 |
| 18 | 419831 |
| 19 | 1257599 |
| 20 | 3453557 |
| 21 | 8911341 |
| 22 | 22636845 |
| 23 | 59890162 |
| 24 | 172264224 |
| 25 | 529706648 |
| 26 | 1630328686 |
| 27 | 4765347773 |
| 28 | 13125989799 |
| 29 | 35253234315 |
| 30 | 97531470556 |
| 31 | 287880507391 |
| 32 | 894915519516 |