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 | 12 |
| 2 | 133 |
| 3 | 1464 |
| 4 | 16105 |
| 5 | 177156 |
| 6 | 1948717 |
| 7 | 21435888 |
| 8 | 235794769 |
| 9 | 2593742460 |
| 10 | 28531167061 |
| 11 | 313842837672 |
| 12 | 3452271214393 |
| 13 | 37974983358324 |
| 14 | 417724816941565 |
| 15 | 4594972986357216 |
| 16 | 50544702849929377 |
| 17 | 555991731349223148 |