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) |
|---|---|
| 3 | 1 |
| 4 | 10 |
| 5 | 237 |
| 6 | 10707 |
| 7 | 774924 |
| 8 | 78702536 |
| 9 | 10273189176 |
| 10 | 1631331753120 |
| 11 | 304206135619160 |
| 12 | 65030138045062272 |
| 13 | 15659855107404275280 |
| 14 | 4191800375194003211360 |
| 15 | 1234179902360142341550240 |
| 16 | 396280329098426228719121280 |
| 17 | 137779269467538258010671193472 |