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 | 2 |
| 2 | 5 |
| 3 | 19 |
| 4 | 103 |
| 5 | 733 |
| 6 | 6691 |
| 7 | 76831 |
| 8 | 1081429 |
| 9 | 18242699 |
| 10 | 361919671 |
| 11 | 8309068723 |
| 12 | 217809953467 |
| 13 | 6445388418589 |
| 14 | 213232943658197 |
| 15 | 7821073506524401 |
| 16 | 315743571062703689 |