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 | 13 |
| 2 | 115 |
| 3 | 1036 |
| 4 | 9688 |
| 5 | 93571 |
| 6 | 927523 |
| 7 | 9387580 |
| 8 | 96634294 |
| 9 | 1008719002 |
| 10 | 10653244294 |
| 11 | 113630599852 |
| 12 | 1222361061310 |
| 13 | 13246563382735 |
| 14 | 144479425979635 |
| 15 | 1584810988780420 |
| 16 | 17471975574010630 |
| 17 | 193493968384827670 |