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 | 9 |
| 3 | 56 |
| 4 | 1059 |
| 5 | 37897 |
| 6 | 2602065 |
| 7 | 409525082 |
| 8 | 128171125105 |
| 9 | 83333126432833 |
| 10 | 114403160523019326 |
| 11 | 323325261181740261922 |
| 12 | 1905368274130445991781276 |