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 | 13 |
| 2 | 71 |
| 3 | -1625 |
| 4 | -41999 |
| 5 | 91013 |
| 6 | 21762679 |
| 7 | 229399183 |
| 8 | -11947008415 |
| 9 | -335160068867 |
| 10 | 6180180526759 |
| 11 | 408799214337527 |
| 12 | -1347844821458351 |
| 13 | -498269858739890315 |
| 14 | -4760353861080634921 |
| 15 | 621741645997081258207 |
| 16 | 15080361573750589690561 |