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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 3 |
| 7 | 1 |
| 8 | 9 |
| 9 | 8 |
| 10 | 34 |
| 11 | 45 |
| 12 | 177 |
| 13 | 324 |
| 14 | 1048 |
| 15 | 2566 |
| 16 | 8050 |
| 17 | 22840 |
| 18 | 73562 |
| 19 | 231978 |
| 20 | 780221 |
| 21 | 2653042 |
| 22 | 9377141 |
| 23 | 33820014 |
| 24 | 125473936 |
| 25 | 475719042 |
| 26 | 1846424607 |
| 27 | 7317819857 |
| 28 | 29611827086 |
| 29 | 122190972442 |
| 30 | 513900819816 |
| 31 | 2201109101784 |
| 32 | 9595815668795 |
| 33 | 42553843201446 |
| 34 | 191861748624324 |
| 35 | 879049648551947 |