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 | 66 |
| 2 | 1740 |
| 3 | 14724 |
| 4 | 73680 |
| 5 | 270150 |
| 6 | 804636 |
| 7 | 2063880 |
| 8 | 4728384 |
| 9 | 9915210 |
| 10 | 19361100 |
| 11 | 35650956 |
| 12 | 62496720 |
| 13 | 105071694 |
| 14 | 170405340 |
| 15 | 267843600 |
| 16 | 409579776 |
| 17 | 611261010 |
| 18 | 892675404 |
| 19 | 1278524820 |
| 20 | 1799288400 |
| 21 | 2492181846 |
| 22 | 3402217500 |
| 23 | 4583370264 |