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 | 5 |
| 3 | 49 |
| 4 | 809 |
| 5 | 20317 |
| 6 | 722813 |
| 7 | 34607305 |
| 8 | 2145998417 |
| 9 | 167317266613 |
| 10 | 16020403322021 |
| 11 | 1848020950359841 |
| 12 | 252778977216700025 |
| 13 | 40453941942593304589 |
| 14 | 7488583061542051450829 |
| 15 | 1587688770629724715374457 |
| 16 | 382218817191632327375004833 |