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 | 1 |
| 2 | 52 |
| 3 | 733 |
| 4 | 9394 |
| 5 | 119235 |
| 6 | 1512196 |
| 7 | 19177677 |
| 8 | 243212478 |
| 9 | 3084441599 |
| 10 | 39117172360 |
| 11 | 496087629441 |
| 12 | 6291429718962 |
| 13 | 79788500460003 |
| 14 | 1011885230273244 |
| 15 | 12832823194696645 |
| 16 | 162747064808635206 |
| 17 | 2063973507784856167 |
| 18 | 26175505197898511728 |
| 19 | 331960206747350288969 |
| 20 | 4209950410912939269210 |