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 | 6 |
| 2 | 41 |
| 3 | 286 |
| 4 | 2001 |
| 5 | 14006 |
| 6 | 98041 |
| 7 | 686286 |
| 8 | 4804001 |
| 9 | 33628006 |
| 10 | 235396041 |
| 11 | 1647772286 |
| 12 | 11534406001 |
| 13 | 80740842006 |
| 14 | 565185894041 |
| 15 | 3956301258286 |
| 16 | 27694108808001 |
| 17 | 193858761656006 |
| 18 | 1357011331592041 |
| 19 | 9499079321144286 |