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 | 15 |
| 3 | 397 |
| 4 | 35324 |
| 5 | 18446134 |
| 6 | 41752489852 |
| 7 | 409764131469787 |
| 8 | 17368974525101032256 |
| 9 | 3195393813996265512672344 |
| 10 | 2544868518166378264304163732974 |