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 | 230 |
| 5 | 91993 |
| 6 | 14037879 |
| 7 | 1509286261 |
| 8 | 136653987232 |
| 9 | 11209147489701 |
| 10 | 862949794999193 |
| 11 | 63573922606869037 |
| 12 | 4535012297248660194 |
| 13 | 315713834759742768349 |
| 14 | 21570075957885603579067 |