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) |
|---|---|
| 11 | 4 |
| 12 | 0 |
| 13 | 4 |
| 14 | 24 |
| 15 | 16 |
| 16 | 56 |
| 17 | 306 |
| 18 | 176 |
| 19 | 456 |
| 20 | 2632 |
| 21 | 1536 |
| 22 | 4828 |
| 23 | 26788 |
| 24 | 15424 |
| 25 | 44952 |
| 26 | 254288 |
| 27 | 147728 |
| 28 | 448032 |
| 29 | 2502568 |
| 30 | 1448416 |
| 31 | 4310048 |
| 32 | 24228704 |
| 33 | 14060048 |
| 34 | 42195584 |
| 35 | 236335248 |
| 36 | 136947616 |
| 37 | 409403328 |
| 38 | 2297294496 |
| 39 | 1332257856 |
| 40 | 3989883552 |
| 41 | 22366625344 |
| 42 | 12965578752 |
| 43 | 38798663104 |
| 44 | 217604833360 |
| 45 | 126169362176 |