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 | 13 |
| 1 | 203 |
| 2 | 1615 |
| 3 | 51595 |
| 4 | 412529 |
| 5 | 6599099 |
| 6 | 52788535 |
| 7 | 3378355987 |
| 8 | 27026481101 |
| 9 | 432421205841 |
| 10 | 3459361042977 |
| 11 | 110699432952143 |
| 12 | 885595037556565 |
| 13 | 14169517557800915 |
| 14 | 113356129507566775 |
| 15 | 14509583941597490435 |