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 | 6 |
| 7 | 16 |
| 8 | 78 |
| 9 | 415 |
| 10 | 3374 |
| 11 | 35860 |
| 12 | 524386 |
| 13 | 10193061 |
| 14 | 263036202 |
| 15 | 8948113645 |
| 16 | 400280198048 |