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 | 6 |
| 2 | 36 |
| 3 | 211 |
| 4 | 1231 |
| 5 | 7160 |
| 6 | 41526 |
| 7 | 240170 |
| 8 | 1385338 |
| 9 | 7970326 |
| 10 | 45742764 |
| 11 | 261899866 |
| 12 | 1496074920 |
| 13 | 8527336280 |
| 14 | 48500972230 |
| 15 | 275294704851 |
| 16 | 1559507239653 |
| 17 | 8817578095886 |
| 18 | 49763675574292 |
| 19 | 280352403988287 |
| 20 | 1576707102660739 |