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 | 18 |
| 2 | 88 |
| 3 | 4030 |
| 4 | 5830 |
| 5 | 518656 |
| 6 | 13174976 |
| 7 | 134094848 |
| 8 | 2146926592 |
| 9 | 2251798907715584 |
| 10 | 12504224434300196 |
| 11 | 324257317741920256 |