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 | 0 |
| 2 | -3 |
| 3 | -15 |
| 4 | -14 |
| 5 | 1755 |
| 6 | 60357 |
| 7 | 1740284 |
| 8 | 45816165 |
| 9 | 776485557 |
| 10 | -37342503290 |
| 11 | -7203185712261 |
| 12 | -822818831400759 |
| 13 | -85463040449605000 |
| 14 | -8640073895507612019 |
| 15 | -843669753827174738535 |
| 16 | -73050419139737972150438 |
| 17 | -3478007209663880122501701 |