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 | 0 |
| 2 | 10 |
| 3 | 82 |
| 4 | 740 |
| 5 | 282429536492 |
| 6 | 109418989131512359292 |
| 7 | 193632597890512706847971583764083347958511186984324587565465147107798425867049291402906445603076812 |