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 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 47 |
| 6 | 47 |
| 7 | 6047 |
| 8 | 477727 |
| 9 | 30596497 |
| 10 | 3388516667 |
| 11 | 340746580567 |
| 12 | 1763093883977 |
| 13 | 773521306107547 |
| 14 | 1142275515892937 |
| 15 | 391230854658184967 |