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 | 6 |
| 2 | 30 |
| 3 | 126 |
| 4 | 90 |
| 5 | 990 |
| 6 | 3276 |
| 7 | 1260 |
| 8 | 1980 |
| 9 | 33660 |
| 10 | 93366 |
| 11 | 24570 |
| 12 | 20790 |
| 13 | 50490 |
| 14 | 1161270 |
| 15 | 2800980 |
| 16 | 560196 |
| 17 | 324324 |
| 18 | 424116 |
| 19 | 1393524 |
| 20 | 40412196 |
| 21 | 86830380 |
| 22 | 14004900 |
| 23 | 6162156 |
| 24 | 5513508 |
| 25 | 9754668 |
| 26 | 40412196 |
| 27 | 1414426860 |
| 28 | 2753763480 |
| 29 | 372130200 |
| 30 | 132046200 |
| 31 | 89791416 |
| 32 | 108694872 |
| 33 | 242473176 |
| 34 | 1212365880 |