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 | 17 |
| 3 | 7849 |
| 4 | 3667649 |
| 5 | 2395420006033 |
| 6 | 3143661612445145 |
| 7 | 11877172892329028459041 |
| 8 | 32347093457545958193355601 |
| 9 | 424678439961073471604787362241217 |