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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 490 |
| 6 | 1308270 |
| 7 | 1085660748 |
| 8 | 483349680164 |
| 9 | 147791677696350 |
| 10 | 35419166732721930 |
| 11 | 7189973830216081696 |
| 12 | 1298090729995668204288 |
| 13 | 215276329320562758744210 |
| 14 | 33531967207612008887673350 |