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 | 50 |
| 5 | 19963 |
| 6 | 3561696 |
| 7 | 375158732 |
| 8 | 28900653074 |
| 9 | 1816451773537 |
| 10 | 98630203059528 |
| 11 | 4776270743160543 |
| 12 | 210237300968913438 |
| 13 | 8515061595908633741 |
| 14 | 320057339932017724468 |