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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 15625 |
| 5 | 7210119 |
| 6 | 7595819716 |
| 7 | 38315570995200 |
| 8 | 907603926752600100 |
| 9 | 90471688044300692000805 |
| 10 | 36477409490805834487688340121 |
| 11 | 57078206407327794909123594938975856 |
| 12 | 349529784665230581716185532814423836231824 |
| 13 | 8484852661962127775820139948519390269746327643440 |