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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 6 |
| 7 | 11 |
| 8 | 32 |
| 9 | 61 |
| 10 | 158 |
| 11 | 308 |
| 12 | 749 |
| 13 | 1481 |
| 14 | 3481 |
| 15 | 6997 |
| 16 | 16086 |
| 17 | 32692 |
| 18 | 74114 |
| 19 | 152114 |
| 20 | 341410 |
| 21 | 705978 |
| 22 | 1573062 |
| 23 | 3273527 |
| 24 | 7253791 |