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 | 5 |
| 2 | 110 |
| 3 | 3876 |
| 4 | 164450 |
| 5 | 7713420 |
| 6 | 385300240 |
| 7 | 20096692635 |
| 8 | 1081790956890 |
| 9 | 59647783837425 |
| 10 | 3351648108957720 |
| 11 | 191230475831922200 |
| 12 | 11049110585626417200 |
| 13 | 645189590847792998601 |
| 14 | 38014810319396501088720 |
| 15 | 2257261555792984515847380 |
| 16 | 134939208350635886836436490 |