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 | 81 |
| 2 | 6561 |
| 3 | 80070 |
| 4 | 2371090 |
| 5 | 60684900 |
| 6 | 1482397764 |
| 7 | 37849652838 |
| 8 | 954576893140 |
| 9 | 24031904480250 |
| 10 | 606711286710758 |
| 11 | 15303296459686032 |
| 12 | 385968153194641688 |
| 13 | 9736392679516458222 |
| 14 | 245594233526815556440 |
| 15 | 6194918451958959626262 |