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 | 1 |
| 3 | 54 |
| 4 | 3856 |
| 5 | 384375 |
| 6 | 52173801 |
| 7 | 9342271792 |
| 8 | 2144652558336 |
| 9 | 616093495529805 |
| 10 | 217007162119140625 |
| 11 | 92121505246667356416 |
| 12 | 46444033776765696086016 |
| 13 | 27459259766085858672714571 |
| 14 | 18830590227539089561714381425 |
| 15 | 14834398958231516437500000000000 |