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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 4 |
| 6 | 12 |
| 7 | 23 |
| 8 | 66 |
| 9 | 139 |
| 10 | 341 |
| 11 | 567 |
| 12 | 2034 |
| 13 | 2495 |
| 14 | 6354 |
| 15 | 12908 |
| 16 | 30261 |
| 17 | 26556 |
| 18 | 110145 |
| 19 | 95967 |
| 20 | 377523 |
| 21 | 499672 |
| 22 | 788726 |
| 23 | 845130 |
| 24 | 4998370 |
| 25 | 3694670 |
| 26 | 7406217 |
| 27 | 13175181 |
| 28 | 33557076 |
| 29 | 22381719 |
| 30 | 117770863 |