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) |
|---|---|
| 8 | 1 |
| 9 | 7 |
| 10 | 40 |
| 11 | 185 |
| 12 | 732 |
| 13 | 2544 |
| 14 | 7949 |
| 15 | 22668 |
| 16 | 59773 |
| 17 | 147228 |
| 18 | 341653 |
| 19 | 752182 |
| 20 | 1580470 |
| 21 | 3185224 |
| 22 | 6183637 |
| 23 | 11606151 |
| 24 | 21127675 |
| 25 | 37405050 |
| 26 | 64561161 |
| 27 | 108866382 |
| 28 | 179684155 |
| 29 | 290762751 |
| 30 | 461978659 |
| 31 | 721658992 |
| 32 | 1109643254 |
| 33 | 1681275261 |