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 | 3 |
| 3 | 7 |
| 4 | 212 |
| 5 | 2357 |
| 6 | 23357 |
| 7 | 244038 |
| 8 | 678196107 |
| 9 | 745281554823038 |
| 10 | 703957001491895099962643 |