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) |
|---|---|
| 1 | 30 |
| 2 | 240 |
| 3 | 840 |
| 4 | 5544 |
| 5 | 6864 |
| 6 | 26520 |
| 7 | 23256 |
| 8 | 73416 |
| 9 | 208104 |
| 10 | 107880 |
| 11 | 467976 |
| 12 | 473304 |
| 13 | 296184 |
| 14 | 727560 |
| 15 | 1494600 |
| 16 | 2101344 |
| 17 | 863760 |
| 18 | 3138816 |
| 19 | 2625864 |
| 20 | 1492704 |
| 21 | 5259504 |
| 22 | 4248936 |
| 23 | 7623384 |
| 24 | 12845904 |
| 25 | 7759224 |
| 26 | 4244424 |