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 | 2 |
| 3 | 10 |
| 4 | 64 |
| 5 | 442 |
| 6 | 3166 |
| 7 | 23164 |
| 8 | 171884 |
| 9 | 1288404 |
| 10 | 9731818 |
| 11 | 73951550 |
| 12 | 564689040 |
| 13 | 4329242164 |
| 14 | 33302459936 |
| 15 | 256913334792 |
| 16 | 1986880768892 |
| 17 | 15399049701698 |