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) |
|---|---|
| 4 | 1 |
| 5 | 2 |
| 6 | 8 |
| 7 | 22 |
| 8 | 69 |
| 9 | 194 |
| 10 | 564 |
| 11 | 1584 |
| 12 | 4484 |
| 13 | 12550 |
| 14 | 35204 |
| 15 | 98412 |
| 16 | 275422 |
| 17 | 770416 |
| 18 | 2157334 |
| 19 | 6044684 |
| 20 | 16956389 |
| 21 | 47614380 |
| 22 | 133865184 |
| 23 | 376789710 |
| 24 | 1061822884 |
| 25 | 2995785714 |
| 26 | 8461975888 |
| 27 | 23928712708 |
| 28 | 67739408492 |
| 29 | 191964821890 |
| 30 | 544559201634 |
| 31 | 1546306248630 |
| 32 | 4394984617389 |