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) |
|---|---|
| 2 | 1 |
| 3 | -1 |
| 4 | 3 |
| 5 | 1 |
| 6 | -6 |
| 7 | 6 |
| 8 | -1 |
| 9 | 27 |
| 10 | -108 |
| 11 | 100 |
| 12 | 1 |
| 13 | -36 |
| 14 | 216 |
| 15 | -400 |
| 16 | 225 |
| 17 | -1 |
| 18 | 135 |
| 19 | -2160 |
| 20 | 10000 |
| 21 | -16875 |
| 22 | 9261 |
| 23 | 1 |
| 24 | -162 |
| 25 | 3240 |
| 26 | -20000 |
| 27 | 50625 |
| 28 | -55566 |
| 29 | 21952 |
| 30 | -1 |
| 31 | 567 |
| 32 | -27216 |
| 33 | 350000 |
| 34 | -1771875 |
| 35 | 4084101 |
| 36 | -4302592 |
| 37 | 1679616 |
| 38 | 1 |
| 39 | -648 |
| 40 | 36288 |
| 41 | -560000 |
| 42 | 3543750 |
| 43 | -10890936 |
| 44 | 17210368 |
| 45 | -13436928 |