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) |
|---|---|
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 6 |
| 6 | 2 |
| 7 | 150 |
| 8 | 19 |
| 9 | 16 |
| 10 | 12 |
| 11 | 1536160080 |
| 12 | 8 |
| 13 | 9918821194590 |
| 14 | 300 |
| 15 | 188 |
| 16 | 65 |
| 17 | 341976204789992332560 |
| 18 | 157 |
| 19 | 2166703103992332274919550 |
| 20 | 24 |
| 21 | 450 |
| 22 | 3072320160 |