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 | -21 |
| 2 | -22 |
| 3 | 12033 |
| 4 | 12122 |
| 5 | -6375621 |
| 6 | -19248262 |
| 7 | 57342230841 |
| 8 | 57701985242 |
| 9 | -55315604680371 |
| 10 | -278311242652102 |
| 11 | 652259156733139683 |
| 12 | 1969038425353086362 |
| 13 | -2726905200094657136121 |
| 14 | -19207940244101240551942 |
| 15 | 245547306017374565928933657 |
| 16 | 247085855919355908190107482 |