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 | 105 |
| 2 | 6860 |
| 3 | 360150 |
| 4 | 16689351 |
| 5 | 714717675 |
| 6 | 29027537770 |
| 7 | 1135995214200 |
| 8 | 43285014073301 |
| 9 | 1617172212901245 |
| 10 | 59536438207963080 |
| 11 | 2167526889938878650 |
| 12 | 78241359077417918851 |
| 13 | 2805721220626405336815 |
| 14 | 100098458195602131838790 |