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 | 10 |
| 2 | 342 |
| 3 | 20421 |
| 4 | 1726760 |
| 5 | 188665362 |
| 6 | 25257633874 |
| 7 | 4001931082418 |
| 8 | 732295911309956 |
| 9 | 151957855559538858 |
| 10 | 35257207352182955135 |
| 11 | 9044237131202445725077 |
| 12 | 2541585712463861383036826 |