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 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 21 |
| 6 | 51 |
| 7 | 89 |
| 8 | 203 |
| 9 | 370 |
| 10 | 715 |
| 11 | 1197 |
| 12 | 2418 |
| 13 | 3813 |
| 14 | 7175 |
| 15 | 11379 |
| 16 | 19026 |
| 17 | 29809 |
| 18 | 51618 |
| 19 | 75378 |
| 20 | 125951 |
| 21 | 185025 |
| 22 | 285449 |