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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 72 |
| 4 | 17055 |
| 5 | 37191123 |
| 6 | 731807102304 |
| 7 | 129633035920625844 |
| 8 | 206676152816612330273175 |
| 9 | 2965575655806580962693168234624 |
| 10 | 382974905786208201171725242242120141033 |