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 | -42 |
| 2 | -9702 |
| 3 | -3124044 |
| 4 | -1148086170 |
| 5 | -453264419916 |
| 6 | -187198205425308 |
| 7 | -79746435511181208 |
| 8 | -34749509273997211386 |
| 9 | -15405615778138763714460 |
| 10 | -6923283730695560413278324 |
| 11 | -3145688371456037358687733032 |
| 12 | -1442298118312593128958325595172 |