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 | 60 |
| 2 | 3601 |
| 3 | 216120 |
| 4 | 12970801 |
| 5 | 778464180 |
| 6 | 46720821601 |
| 7 | 2804027760240 |
| 8 | 168288386436001 |
| 9 | 10100107213920300 |
| 10 | 606174721221654001 |
| 11 | 36380583380513160360 |
| 12 | 2183441177552011275601 |
| 13 | 131042851236501189696420 |
| 14 | 7864754515367623393060801 |
| 15 | 472016313773293904773344480 |