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 | 46 |
| 2 | 2070 |
| 3 | 92115 |
| 4 | 4098600 |
| 5 | 182342160 |
| 6 | 8112199590 |
| 7 | 360902223000 |
| 8 | 16056115855560 |
| 9 | 714317717862540 |
| 10 | 31779155482826400 |
| 11 | 1413817266133308960 |
| 12 | 62899068010426041240 |
| 13 | 2798305588240613272800 |
| 14 | 124493325781573753947360 |