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 | -1 |
| 2 | 1 |
| 3 | -2 |
| 4 | -1 |
| 5 | 3 |
| 6 | -2 |
| 7 | -1 |
| 8 | 2 |
| 9 | 1 |
| 10 | -152 |
| 11 | -78 |
| 12 | 125 |
| 13 | 90 |
| 14 | 15 |
| 15 | -216 |
| 16 | -114 |
| 17 | 157 |
| 18 | 135 |
| 19 | 35 |
| 20 | 3 |
| 21 | -41424 |
| 22 | -22444 |
| 23 | 27552 |
| 24 | 26551 |
| 25 | 8505 |
| 26 | 1197 |
| 27 | 63 |
| 28 | -66000 |
| 29 | -36620 |
| 30 | 40976 |
| 31 | 42917 |
| 32 | 15652 |
| 33 | 2814 |
| 34 | 252 |
| 35 | 9 |
| 36 | -13037952 |
| 37 | -7390832 |
| 38 | 7652084 |
| 39 | 8557940 |
| 40 | 3414775 |
| 41 | 714840 |
| 42 | 83790 |
| 43 | 5220 |
| 44 | 135 |
| 45 | -21995904 |