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 | 4 |
| 5 | 14 |
| 6 | 74 |
| 7 | 434 |
| 8 | 2876 |
| 9 | 19848 |
| 10 | 143306 |
| 11 | 1062149 |
| 12 | 8058223 |
| 13 | 62259820 |
| 14 | 488630360 |
| 15 | 3886211100 |
| 16 | 31267852668 |