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 | 3 |
| 2 | 36 |
| 3 | 393 |
| 4 | 4287 |
| 5 | 46764 |
| 6 | 510117 |
| 7 | 5564523 |
| 8 | 60699636 |
| 9 | 662131473 |
| 10 | 7222746567 |
| 11 | 78788080764 |
| 12 | 859446141837 |
| 13 | 9375119479443 |
| 14 | 102266868132036 |
| 15 | 1115560429972953 |
| 16 | 12168897861570447 |
| 17 | 132742316047301964 |
| 18 | 1447996578658751157 |
| 19 | 15795220049198960763 |
| 20 | 172299423962529817236 |
| 21 | 1879498443538629028833 |
| 22 | 20502183454962389499927 |