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 | -3 |
| 3 | -5 |
| 4 | 1 |
| 5 | -9 |
| 6 | 15 |
| 7 | -13 |
| 8 | 1 |
| 9 | 4 |
| 10 | 27 |
| 11 | -21 |
| 12 | -5 |
| 13 | -25 |
| 14 | 39 |
| 15 | 45 |
| 16 | 1 |
| 17 | -33 |
| 18 | -12 |
| 19 | -37 |
| 20 | -9 |
| 21 | 65 |
| 22 | 63 |
| 23 | -45 |
| 24 | -5 |
| 25 | 16 |
| 26 | 75 |
| 27 | 4 |
| 28 | -13 |
| 29 | -57 |
| 30 | -135 |
| 31 | -61 |
| 32 | 1 |
| 33 | 105 |
| 34 | 99 |
| 35 | 117 |
| 36 | 4 |
| 37 | -73 |
| 38 | 111 |
| 39 | 125 |
| 40 | -9 |
| 41 | -81 |
| 42 | -195 |
| 43 | -85 |
| 44 | -21 |
| 45 | -36 |
| 46 | 135 |
| 47 | -93 |
| 48 | -5 |
| 49 | 36 |
| 50 | -48 |
| 51 | 165 |
| 52 | -25 |
| 53 | -105 |
| 54 | -12 |
| 55 | 189 |
| 56 | -13 |
| 57 | 185 |
| 58 | 171 |
| 59 | -117 |
| 60 | 45 |
| 61 | -121 |
| 62 | 183 |
| 63 | -52 |
| 64 | 1 |
| 65 | 225 |
| 66 | -315 |
| 67 | -133 |
| 68 | -33 |
| 69 | 225 |
| 70 | -351 |
| 71 | -141 |
| 72 | 4 |