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 | -4 |
| 3 | -6 |
| 4 | 4 |
| 5 | -10 |
| 6 | 24 |
| 7 | -14 |
| 8 | 0 |
| 9 | 9 |
| 10 | 40 |
| 11 | -22 |
| 12 | -24 |
| 13 | -26 |
| 14 | 56 |
| 15 | 60 |
| 16 | 0 |
| 17 | -34 |
| 18 | -36 |
| 19 | -38 |
| 20 | -40 |
| 21 | 84 |
| 22 | 88 |
| 23 | -46 |
| 24 | 0 |
| 25 | 25 |
| 26 | 104 |
| 27 | 0 |
| 28 | -56 |
| 29 | -58 |
| 30 | -240 |
| 31 | -62 |
| 32 | 0 |
| 33 | 132 |
| 34 | 136 |
| 35 | 140 |
| 36 | 36 |
| 37 | -74 |
| 38 | 152 |
| 39 | 156 |
| 40 | 0 |
| 41 | -82 |
| 42 | -336 |
| 43 | -86 |
| 44 | -88 |
| 45 | -90 |
| 46 | 184 |
| 47 | -94 |
| 48 | 0 |
| 49 | 49 |
| 50 | -100 |
| 51 | 204 |
| 52 | -104 |
| 53 | -106 |
| 54 | 0 |
| 55 | 220 |
| 56 | 0 |
| 57 | 228 |
| 58 | 232 |
| 59 | -118 |
| 60 | 240 |