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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 115 |
| 6 | 1613250 |
| 7 | 4693213105 |
| 8 | 5971431466764 |
| 9 | 4657267944250425 |
| 10 | 2654563364004395160 |
| 11 | 1223795727111874798255 |
| 12 | 485987045749653063943998 |
| 13 | 173253367143529540187635315 |
| 14 | 57037488183550191520963561230 |