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 | 2 |
| 2 | 10 |
| 3 | 153 |
| 4 | 7697 |
| 5 | 1031105 |
| 6 | 451200772 |
| 7 | 697702378939 |
| 8 | 3293112511839389 |
| 9 | 46764849359077493872 |
| 10 | 2109508899293218313962632 |