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 | 6 |
| 2 | 150 |
| 3 | 180150 |
| 4 | 519264540150 |
| 5 | 8628341205030630049260150 |
| 6 | 4764689404827483203666304150636608674826622242700150 |