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) |
|---|---|
| 2 | 1 |
| 3 | -107 |
| 4 | 10 |
| 5 | 59845 |
| 6 | -7497 |
| 7 | 210 |
| 8 | -6059823 |
| 9 | 854396 |
| 10 | -35574 |
| 11 | 420 |
| 12 | 5508149745 |
| 13 | -827924889 |
| 14 | 41094790 |
| 15 | -765534 |
| 16 | 4620 |
| 17 | -8781562891079 |
| 18 | 1373931797082 |
| 19 | -75405128227 |
| 20 | 1738417252 |
| 21 | -17219202 |
| 22 | 60060 |