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) |
|---|---|
| 3 | 11 |
| 4 | 20 |
| 5 | 101 |
| 6 | 182 |
| 7 | 911 |
| 8 | 1640 |
| 9 | 8201 |
| 10 | 14762 |
| 11 | 73811 |
| 12 | 132860 |
| 13 | 664301 |
| 14 | 1195742 |
| 15 | 5978711 |
| 16 | 10761680 |
| 17 | 53808401 |
| 18 | 96855122 |
| 19 | 484275611 |
| 20 | 871696100 |
| 21 | 4358480501 |
| 22 | 7845264902 |
| 23 | 39226324511 |
| 24 | 70607384120 |
| 25 | 353036920601 |
| 26 | 635466457082 |
| 27 | 3177332285411 |