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 | 1 |
| 1 | 39 |
| 2 | 1521 |
| 3 | 59319 |
| 4 | 2313441 |
| 5 | 90224199 |
| 6 | 3518743761 |
| 7 | 137231006679 |
| 8 | 5352009260481 |
| 9 | 208728361158759 |
| 10 | 8140406085191601 |
| 11 | 317475837322472439 |
| 12 | 12381557655576425121 |
| 13 | 482880748567480579719 |
| 14 | 18832349194131742609041 |
| 15 | 734461618571137961752599 |
| 16 | 28644003124274380508351361 |