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 | 80 |
| 2 | 6400 |
| 3 | 512000 |
| 4 | 40960000 |
| 5 | 3276800000 |
| 6 | 262144000000 |
| 7 | 20971520000000 |
| 8 | 1677721600000000 |
| 9 | 134217728000000000 |
| 10 | 10737418240000000000 |
| 11 | 858993459200000000000 |
| 12 | 68719476736000000000000 |
| 13 | 5497558138880000000000000 |
| 14 | 439804651110400000000000000 |
| 15 | 35184372088832000000000000000 |