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 | 6 |
| 2 | 8 |
| 3 | 30 |
| 4 | 36 |
| 5 | 44 |
| 6 | 156 |
| 7 | 696 |
| 8 | 944 |
| 9 | 2800 |
| 10 | 2928 |
| 11 | 3600 |
| 12 | 6660 |
| 13 | 16064 |
| 14 | 195456 |
| 15 | 260864 |
| 16 | 784128 |
| 17 | 4189184 |
| 18 | 12573696 |
| 19 | 201289728 |
| 20 | 17179541504 |
| 21 | 274876596224 |
| 22 | 824631361536 |