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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 10 |
| 6 | 27 |
| 7 | 67 |
| 8 | 154 |
| 9 | 350 |
| 10 | 763 |
| 11 | 1638 |
| 12 | 3450 |
| 13 | 7191 |
| 14 | 14831 |
| 15 | 30398 |
| 16 | 61891 |
| 17 | 125557 |
| 18 | 253841 |
| 19 | 511818 |
| 20 | 1029863 |
| 21 | 2069341 |
| 22 | 4153060 |
| 23 | 8327646 |
| 24 | 16687483 |
| 25 | 33422562 |
| 26 | 66916342 |
| 27 | 133936603 |
| 28 | 268026776 |
| 29 | 536277032 |
| 30 | 1072886163 |
| 31 | 2146245056 |
| 32 | 4293187682 |
| 33 | 8587371116 |