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 | 5 |
| 2 | 57 |
| 3 | 577 |
| 4 | 5772 |
| 5 | 57721 |
| 6 | 577215 |
| 7 | 5772156 |
| 8 | 57721566 |
| 9 | 577215664 |
| 10 | 5772156649 |
| 11 | 57721566490 |
| 12 | 577215664901 |
| 13 | 5772156649015 |
| 14 | 57721566490153 |
| 15 | 577215664901532 |
| 16 | 5772156649015328 |
| 17 | 57721566490153286 |
| 18 | 577215664901532860 |