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 | 1 |
| 1 | 5 |
| 2 | 50 |
| 3 | 525 |
| 4 | 5675 |
| 5 | 62650 |
| 6 | 703975 |
| 7 | 8042625 |
| 8 | 93454750 |
| 9 | 1106250125 |
| 10 | 13377432875 |
| 11 | 165950540250 |
| 12 | 2124087269375 |
| 13 | 28260204825625 |
| 14 | 394301229688750 |
| 15 | 5824314672613125 |
| 16 | 91872380184761875 |
| 17 | 1557002324898406250 |