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 | -6 |
| 2 | -5166 |
| 3 | -5940900 |
| 4 | -7690495050 |
| 5 | -10622111763060 |
| 6 | -15285218827043340 |
| 7 | -22626491069403298440 |
| 8 | -34194284628635734767450 |
| 9 | -52499624999832064779624900 |
| 10 | -81615917024738927906404869540 |
| 11 | -128166668244121840059567065130360 |