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 | 2 |
| 3 | 1 |
| 4 | -148 |
| 5 | -3719 |
| 6 | -20098 |
| 7 | 5055961 |
| 8 | 403644152 |
| 9 | 7831409041 |
| 10 | -2707151879398 |
| 11 | -472143935754479 |
| 12 | -22085804322342748 |
| 13 | 9362259685093715401 |
| 14 | 2995219209329323622102 |
| 15 | 274269338931958691728681 |
| 16 | -132963342779629343323496848 |
| 17 | -70698673853383423350187244639 |