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 | 54 |
| 2 | 2744280 |
| 3 | 6191640 |
| 4 | 182494620 |
| 5 | 653425920 |
| 6 | 702989280 |
| 7 | 27025270272 |
| 8 | 72475361280 |
| 9 | 76172903718912 |
| 10 | 15224461545984768 |
| 11 | 1688635722988634112 |
| 12 | 5953066676035614584064 |
| 13 | 1608903162935227680030720 |
| 14 | 14600472124349965895417376 |
| 15 | 2263986000385276007625523200 |