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 | 23 |
| 8 | 324 |
| 9 | 3645 |
| 10 | 36223 |
| 11 | 334751 |
| 12 | 2965654 |
| 13 | 25691104 |
| 14 | 220643295 |
| 15 | 1897548384 |
| 16 | 16463907354 |
| 17 | 144927422746 |
| 18 | 1299763249771 |
| 19 | 11912250951457 |
| 20 | 111803042249042 |
| 21 | 1076045623549383 |
| 22 | 10628068291940557 |
| 23 | 107760039986995689 |
| 24 | 1121581530251066296 |
| 25 | 11980190581723881858 |