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) |
|---|---|
| 6 | 1 |
| 7 | 0 |
| 8 | 4 |
| 9 | 6 |
| 10 | 24 |
| 11 | 66 |
| 12 | 214 |
| 13 | 676 |
| 14 | 2209 |
| 15 | 7296 |
| 16 | 24460 |
| 17 | 82926 |
| 18 | 284068 |
| 19 | 981882 |
| 20 | 3421318 |
| 21 | 12007554 |
| 22 | 42416488 |
| 23 | 150718770 |
| 24 | 538421590 |
| 25 | 1932856590 |
| 26 | 6969847486 |
| 27 | 25237057110 |
| 28 | 91729488354 |
| 29 | 334589415276 |
| 30 | 1224445617889 |
| 31 | 4494622119424 |