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 | 10 |
| 2 | 84 |
| 3 | 736 |
| 4 | 6576 |
| 5 | 59080 |
| 6 | 531504 |
| 7 | 4783096 |
| 8 | 43046976 |
| 9 | 387421000 |
| 10 | 3486785424 |
| 11 | 31381061656 |
| 12 | 282429540576 |
| 13 | 2541865836520 |
| 14 | 22876792471344 |
| 15 | 205891132127416 |
| 16 | 1853020188917376 |
| 17 | 16677181699797640 |
| 18 | 150094635297261264 |