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 | 36 |
| 2 | 900 |
| 3 | 19440 |
| 4 | 390096 |
| 5 | 7511616 |
| 6 | 141134400 |
| 7 | 2611802880 |
| 8 | 47870735616 |
| 9 | 871982724096 |
| 10 | 15819463296000 |
| 11 | 286235993272320 |
| 12 | 5170077903015936 |
| 13 | 93275375604350976 |
| 14 | 1681524519443251200 |
| 15 | 30298254922942709760 |