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 | -2 |
| 3 | 0 |
| 4 | 1 |
| 5 | -5 |
| 6 | 0 |
| 7 | 10 |
| 8 | -8 |
| 9 | -5 |
| 10 | 26 |
| 11 | -11 |
| 12 | -28 |
| 13 | 62 |
| 14 | -4 |
| 15 | -101 |
| 16 | 111 |
| 17 | 43 |
| 18 | -260 |
| 19 | 182 |
| 20 | 228 |
| 21 | -583 |
| 22 | 202 |
| 23 | 715 |
| 24 | -1155 |
| 25 | 25 |
| 26 | 1888 |
| 27 | -2034 |
| 28 | -851 |
| 29 | 4286 |
| 30 | -3144 |
| 31 | -3418 |
| 32 | 8895 |
| 33 | -3888 |
| 34 | -9806 |
| 35 | 16848 |
| 36 | -2479 |
| 37 | -23812 |
| 38 | 29519 |
| 39 | 5626 |
| 40 | -52156 |
| 41 | 46930 |
| 42 | 30033 |
| 43 | -105320 |
| 44 | 66001 |
| 45 | 90431 |
| 46 | -198736 |