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 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 19 |
| 5 | 1759 |
| 6 | 192684799 |
| 7 | 14285134079 |
| 8 | 145284339199 |
| 9 | 509122178611199 |
| 10 | 53165268316159999 |
| 11 | 253515360530431999 |
| 12 | 89312661819089868632723554303999999 |
| 13 | 25863781053916181957690694149957243371519999999 |