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 | 3 |
| 4 | 4 |
| 5 | 10 |
| 6 | 10 |
| 7 | 22 |
| 8 | 28 |
| 9 | 64 |
| 10 | 76 |
| 11 | 180 |
| 12 | 260 |
| 13 | 606 |
| 14 | 932 |
| 15 | 2124 |
| 16 | 3440 |
| 17 | 7666 |
| 18 | 12872 |
| 19 | 28178 |
| 20 | 48620 |
| 21 | 104946 |
| 22 | 184756 |
| 23 | 394638 |
| 24 | 705432 |
| 25 | 1494600 |
| 26 | 2704156 |
| 27 | 5693376 |
| 28 | 10400600 |