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 | 3 |
| 2 | 161 |
| 3 | 2886 |
| 4 | 56541 |
| 5 | 1089035 |
| 6 | 20993054 |
| 7 | 404225195 |
| 8 | 7787623959 |
| 9 | 150008013842 |
| 10 | 2889619130491 |
| 11 | 55662670608009 |
| 12 | 1072229459666190 |
| 13 | 20654344779041771 |
| 14 | 397864432000232871 |
| 15 | 7664058367627889686 |
| 16 | 147632676645411073113 |