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 | 31 |
| 2 | 781 |
| 3 | 18621 |
| 4 | 433809 |
| 5 | 10056959 |
| 6 | 232824241 |
| 7 | 5388274121 |
| 8 | 124693133113 |
| 9 | 2885579381831 |
| 10 | 66776768695477 |
| 11 | 1545323639404349 |
| 12 | 35761396310047985 |
| 13 | 827579980089997079 |
| 14 | 19151628770974955241 |
| 15 | 443201843190147840905 |