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 | 2 |
| 3 | 0 |
| 4 | 0 |
| 5 | 4 |
| 6 | -5 |
| 7 | 9 |
| 8 | -6 |
| 9 | 3 |
| 10 | 4 |
| 11 | -9 |
| 12 | 15 |
| 13 | -17 |
| 14 | 13 |
| 15 | -8 |
| 16 | 0 |
| 17 | 1 |
| 18 | -9 |
| 19 | 12 |
| 20 | -17 |
| 21 | 15 |
| 22 | -25 |
| 23 | 29 |
| 24 | -27 |
| 25 | 12 |
| 26 | -3 |
| 27 | -14 |
| 28 | 28 |
| 29 | -55 |
| 30 | 63 |
| 31 | -54 |
| 32 | 53 |
| 33 | -46 |
| 34 | 18 |
| 35 | 32 |
| 36 | -57 |
| 37 | 85 |
| 38 | -106 |
| 39 | 122 |
| 40 | -108 |
| 41 | 43 |
| 42 | 8 |
| 43 | -29 |
| 44 | 80 |
| 45 | -161 |
| 46 | 148 |
| 47 | -115 |
| 48 | 104 |
| 49 | -78 |
| 50 | 57 |
| 51 | 29 |
| 52 | -77 |
| 53 | 89 |
| 54 | -99 |
| 55 | 263 |
| 56 | -283 |
| 57 | 182 |
| 58 | -212 |
| 59 | 133 |
| 60 | 49 |