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) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 1 |
| 4 | 4 |
| 5 | -3 |
| 6 | 1 |
| 7 | -27 |
| 8 | 19 |
| 9 | -6 |
| 10 | 1 |
| 11 | 256 |
| 12 | -175 |
| 13 | 55 |
| 14 | -10 |
| 15 | 1 |
| 16 | -3125 |
| 17 | 2101 |
| 18 | -660 |
| 19 | 125 |
| 20 | -15 |
| 21 | 1 |
| 22 | 46656 |
| 23 | -31031 |
| 24 | 9751 |
| 25 | -1890 |
| 26 | 245 |
| 27 | -21 |
| 28 | 1 |
| 29 | -823543 |
| 30 | 543607 |
| 31 | -170898 |
| 32 | 33621 |
| 33 | -4550 |
| 34 | 434 |
| 35 | -28 |
| 36 | 1 |
| 37 | 16777216 |
| 38 | -11012415 |
| 39 | 3463615 |
| 40 | -688506 |
| 41 | 95781 |
| 42 | -9702 |
| 43 | 714 |
| 44 | -36 |
| 45 | 1 |