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 | -6 |
| 3 | -242 |
| 4 | -7382 |
| 5 | -130472 |
| 6 | -1594852 |
| 7 | -15166900 |
| 8 | -119173924 |
| 9 | -788897224 |
| 10 | -4270968154 |
| 11 | -15821839894 |
| 12 | 13226522262 |
| 13 | 1056215331024 |
| 14 | 14319250065624 |
| 15 | 147391347765784 |
| 16 | 1340374086462424 |