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 | 0 |
| 2 | 3 |
| 3 | 48 |
| 4 | 798 |
| 5 | 2576 |
| 6 | 7040 |
| 7 | 16864 |
| 8 | 48884 |
| 9 | 94639252 |
| 10 | 4617219681 |
| 11 | 20716557246 |
| 12 | 5553546567828 |
| 13 | 183276908527336 |
| 14 | 272413165321136 |
| 15 | 335452673952828 |
| 16 | 8235555774684392 |
| 17 | 224177101582314365 |
| 18 | 709201017174989274 |