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 | 1 |
| 2 | 3 |
| 3 | 95 |
| 4 | 15 |
| 5 | 47 |
| 6 | 483 |
| 7 | 5045 |
| 8 | 6347 |
| 9 | 266447 |
| 10 | 1085919 |
| 11 | 144939 |
| 12 | 54133739 |
| 13 | 3348547 |
| 14 | 1156672145 |
| 15 | 952689827 |
| 16 | 3639059747 |
| 17 | 49394809937 |
| 18 | 5496502370531 |
| 19 | 8029157726715 |