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) |
|---|---|
| 2 | 1 |
| 3 | 0 |
| 4 | 14 |
| 5 | 0 |
| 6 | 23 |
| 7 | 0 |
| 8 | 149 |
| 9 | 205 |
| 10 | 95 |
| 11 | 1736 |
| 12 | 779 |
| 13 | 0 |
| 14 | 4193 |
| 15 | 20400 |
| 16 | 25439 |
| 17 | 0 |
| 18 | 221468 |
| 19 | 0 |
| 20 | 1036394 |
| 21 | 840107 |
| 22 | 1751891 |
| 23 | 6107895 |
| 24 | 5639594 |
| 25 | 8772568 |
| 26 | 66322529 |
| 27 | 60611448 |
| 28 | 99083624 |
| 29 | 458738443 |
| 30 | 989927528 |
| 31 | 0 |
| 32 | 3038229779 |
| 33 | 5238898821 |
| 34 | 393215 |
| 35 | 11960838285 |
| 36 | 27264928469 |
| 37 | 117093979072 |
| 38 | 274827575393 |
| 39 | 276971366821 |