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 | 7 |
| 3 | 181 |
| 4 | 10311 |
| 5 | 1016501 |
| 6 | 152747323 |
| 7 | 32383630189 |
| 8 | 9192184928839 |
| 9 | 3362887443335365 |
| 10 | 1540205755192368507 |
| 11 | 863047803911184565037 |
| 12 | 580733337119861320815291 |
| 13 | 462049013032247252827284109 |