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 | 17 |
| 2 | -161 |
| 3 | -18037 |
| 4 | -89279 |
| 5 | 30948857 |
| 6 | 727008319 |
| 7 | -71202772477 |
| 8 | -3500523336959 |
| 9 | 196821084188897 |
| 10 | 17523077945895199 |
| 11 | -587802553769818117 |
| 12 | -96731879246268143039 |
| 13 | 1529691843170459400137 |
| 14 | 591886254924566446580479 |
| 15 | 425007721743735371005043 |