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 | 2 |
| 1 | 311 |
| 2 | 38873 |
| 3 | 3681131 |
| 4 | 310248241 |
| 5 | 24563311309 |
| 6 | 1870358526653 |
| 7 | 138666449011757 |
| 8 | 10082409897709157 |
| 9 | 722285281729443799 |
| 10 | 51140670371058101123 |
| 11 | 3586789210729460889317 |
| 12 | 249598086801961825095881 |
| 13 | 17254990129969542495182251 |